Vocabulary as Destiny - The Power of Words Part 3

‍This is part 3 in the series The Power of Words. Read part 1, The Grammar of Reality and part 2, Words With Hidden Lives

There is a Russian word, toska, that has no precise English equivalent. Nabokov, who knew both languages better than most people know one, described it as "a longing with nothing to long for, an ache without location, a deep collective yearning without a specific object." It's not quite homesickness, not quite melancholy, not quite existential dread - it's all of them and none of them, something distinctly its own. The point isn't that Russian speakers feel this and English speakers don't. The point is that Russian has handed its speakers a handle to grasp the thing with. A word makes the fog take shape. Once you have toska, you can locate it in yourself, compare notes on it with others, write about it, argue about whether it applies to your current state. Without the word, the feeling is still there. It's just harder to think about.

This is the central argument of this third and final piece in the series on words and language. If Part 1 established that language constructs reality rather than simply reflecting it, and Part 2 explored the hidden lives of individual words through etymology and double meaning, then this piece asks the most personal and practical question of all: what happens to your thinking when you deliberately expand your vocabulary? And what does it cost you when you don't?

The short answer is that a larger vocabulary is not a social trophy or a signal of education. It is a cognitive instrument. The words you have are the tools with which you think. More words means finer cuts, sharper distinctions, more precise purchase on the slippery business of experience. And yet vocabulary development - as a deliberate practice, pursued by adults - is almost completely absent from how we talk about self-improvement.

That needs to change.

The instrument you didn't know you were playing

Steven Pinker opens his book The Stuff of Thought with a declaration that doubles as a provocation,

"We are verbivores, a species that lives on words." Steven Pinker

And elsewhere in the same book,

"Language is a window into human nature, exposing deep and universal features of our thoughts and feelings." Steven Pinker

What Pinker means - and what the research behind his work suggests - is that language isn't merely the packaging for thoughts that exist independently of it. It is partly constitutive of thought. The concepts you can deploy fluently are the concepts you can think with fluency. The ones you only half-know sit at the edge of your mental vision, fuzzy and unreliable. The ones you don't have at all may be unavailable to you in practice, not because you couldn't understand them but because nothing has prompted you to reach for them.

In Part 1, I discussed the Sapir-Whorf hypothesis - the idea that language shapes thought - and was careful to distinguish its weak form (language influences cognition) from its strong form (language determines cognition), the latter of which has been largely abandoned. But the weak form has real teeth, and the more specific claim I'm making here is narrower than Sapir-Whorf. It isn't that your native language limits your thoughts. It's that the breadth of your working vocabulary - the words you can actually use, not just recognise - determines the precision and richness of your thinking in real time. You can always be shown a new word and understand it. But understanding in the moment of encountering it is different from having it available as a tool when you're thinking something through at two in the morning.

Consider the difference between having "angry" and having "indignant," "seething," "exasperated," "affronted," "resentful," and "livid" all in active use. Each describes a distinct emotional and moral state. Indignation carries a sense of violated principle; resentment carries accumulated grievance; being affronted implies a social slight; being livid implies a heat that obscures reason. These are not synonyms. They are different tools. Having only "angry" means reaching for that one blunt instrument every time, regardless of which specific state you're actually in - and being unable, in consequence, to think clearly about the distinctions between them.

What the research actually says

The relationship between vocabulary breadth and cognitive capacity is one of the more robust findings in educational psychology, and it tends to get discussed almost exclusively in the context of children. That's a missed opportunity, because it applies with equal force to adults.

The work of cognitive scientist Maryanne Wolf on reading and vocabulary development demonstrates that the brain's capacity for deep comprehension scales closely with the sophistication of the vocabulary a reader brings to a text. In her 2008 book Proust and the Squid, Wolf argues that reading changes the brain - but that the nature of those changes depends heavily on vocabulary range. A reader encountering an unfamiliar word every other sentence is doing something cognitively different from - and more demanding than - one for whom the vocabulary is fully accessible. The richer your vocabulary, the more cognitive resource you can devote to the ideas rather than the decoding.

There's also the work of psychologist Marc Brackett, whose research on what he calls "emotional granularity" I've referred to previously in the context of change management in Walking on Shifting Sands. The emotional vocabulary dimension of this is worth pulling out here in its own right. Brackett's research found that people with more granular emotional vocabulary - who could distinguish between, say, anxious and apprehensive and dreading - were measurably better at regulating the emotions they could name. The naming itself was part of the regulation mechanism. Labelling an emotion activates the prefrontal cortex, the area associated with rational processing, and damps down the amygdala response. The word is not just a description of the state. It's a partial antidote to it.

This finding has an uncomfortable implication that rarely gets stated plainly: a limited emotional vocabulary isn't just an expressive limitation. It's a regulatory limitation. The person who only has "fine" and "not fine" as internal states isn't just less articulate about their feelings. They are, in a measurable sense, less able to manage them.

The concepts that require words to exist

There's a class of words that don't just describe things but actually enable the thing they describe - or at least make it drastically more accessible. These tend to be words for concepts, relationships, or cognitive moves that are genuinely hard to perform without the vocabulary.

"Sunk cost fallacy" is a good example. Once you have that phrase, you can catch yourself committing it in real time: "I've already spent three hours on this approach and it isn't working - but that's a sunk cost, so I should switch." Before you have the phrase, you're still capable of the rational move, but it requires effort and deliberate reconstruction. The label is a shortcut into the concept, a faster route to applying it when it matters.

"Cognitive dissonance" is another. Before Festinger formalised and named it, people experienced the discomfort of holding incompatible beliefs - but without the concept, it's much harder to recognise the pattern in yourself, name it to others, or reason about how to resolve it. The word makes the thing visible in a way that mere experience doesn't.

This is why professional vocabularies matter beyond professional contexts. Doctors who understand "confirmation bias" - who have that concept in active use - are better diagnosticians than those who don't, not because they're smarter but because they have a tool for catching a specific, well-documented failure mode. Lawyers who understand "motivated reasoning" can interrogate their own arguments more rigorously. Teachers who have the vocabulary of cognitive load theory - intrinsic, extraneous, germane load - can design learning activities that work with human cognition rather than against it.

The same applies to every domain. The vocabulary of systems thinking - feedback loops, leverage points, unintended consequences - makes certain analyses possible that are genuinely harder without it. The vocabulary of psychology - attachment, projection, rationalisation, dissociation - makes it easier to understand both yourself and the people you work and live with. These aren't just technical terms. They're cognitive prosthetics.

The equity dimension nobody talks about enough

There is an uncomfortable class dimension to vocabulary development that tends to get smoothed over in discussions that treat it as a purely individual practice.

In Britain, the correlation between socioeconomic background and vocabulary range is stark and well-documented. The research of Betty Hart and Todd Risley in the 1990s - replicated and refined many times since - found enormous variation in the number of words children heard before starting school, with children from more advantaged backgrounds hearing significantly more. Crucially, the differences weren't just quantitative. They were qualitative: children from wealthier homes heard more varied, complex, and cognitively rich language, including more abstract concepts, more conditional constructions, more explicit reasoning about causes and consequences.

By the time these children reached school, the vocabulary gap was already substantial - and because vocabulary compounds (having more words makes it easier to acquire more words, since you can connect new concepts to existing ones), the gap tended to widen rather than close as schooling progressed.

The education researcher E.D. Hirsch spent much of his career arguing that vocabulary and background knowledge are the great hidden levers of educational inequality - that we focus obsessively on reading skills and teaching strategies while underinvesting in the sheer breadth of conceptual vocabulary children need to access complex texts and ideas. His arguments have been contested in their specifics, but the underlying point has accumulated considerable support: vocabulary isn't a luxury. It is, in a quite direct sense, an equity issue.

The child who arrives in a Year 10 English classroom knowing what "ambivalent" means, what "irony" implies beyond its everyday misuse, what "allegory" does - that child can participate in a different kind of conversation from the one who doesn't. Not because they're more capable but because they have the tools. And schools, in Hirsch's view, have too often assumed that vocabulary would develop naturally from general reading rather than treating it as something to be taught explicitly, systematically, and at scale.

The anti-intellectualism trap

I want to address something that comes up whenever I talk about vocabulary development with adults, which is the suspicion that caring about words is somehow pretentious, elitist, or socially aggressive.It isn't. But I understand where the suspicion comes from. I often get poo-pooed when I use a “big word” and I think there are others in the public sphere who have been misaligned similarly.

There is a particular kind of vocabulary deployment - the correction of other people's usage, the deliberate use of obscure terms when simple ones would do, the performance of linguistic sophistication in contexts where it serves no purpose - that is genuinely tedious and often rude. That's not what I'm arguing for.

What I'm arguing for is private expansion: building your own range not to perform it at others but to think with it yourself. The person who uses "sanguine" and "choleric" and "phlegmatic" where "optimistic," "irritable," and "calm" would do isn't thinking more clearly - they're peacocking. But the person who understands that "cynical" and "sceptical" describe genuinely different epistemic stances, and who uses that distinction in their own thinking, is better equipped than the one who conflates them.

George Orwell - who has appeared in Part 1 of this series for good reason - was insistent on the side of plain language in public communication, and I'm with him on that. Clarity in writing is a form of respect for the reader. But Orwell's argument against jargon and obfuscation is entirely compatible with the argument for rich internal vocabulary, because the goal in both cases is the same: precision. You should use plain words when they're the right words. But you should also have access to the precise word when it's better than the plain one.

How to actually do it

Adults rarely receive practical guidance on vocabulary development, partly because it tends to be framed as a children's problem. I think we can develop it as a deliberate practice, even as adults.

The most effective approach is contextual acquisition rather than list-memorisation. Encountering a word repeatedly in meaningful contexts - reading it, hearing it used, using it yourself in writing - embeds it far more reliably than flashcards or vocabulary apps. This means the single most powerful lever is reading broadly and ambitiously: fiction and non-fiction, across disciplines, in genres you don't normally touch. A novel will give you emotional and relational vocabulary. A book of philosophy will give you conceptual vocabulary. A book on economics, ecology, or neuroscience will give you domain vocabulary that bleeds productively into how you think about adjacent problems.

The second approach is what I'd call the pause and pursue habit. When you encounter a word you half-know - one you'd probably skip over - stop. Look it up properly. Not just its definition but its etymology, its near-synonyms, the contexts in which it's appropriately used versus ones where a simpler word would be better. Five minutes of this a day, consistently applied, is genuinely transformative over a year. I now find myself regularly going to the references pages in books more than I ever did when I was formally studying - how very peculiar (in the modern parlance!)

The third is deliberate use. The neuroscience of memory suggests that active retrieval is far more effective than passive exposure. If you encounter a useful new word, use it - in your writing, in conversation, in your internal monologue. The act of reaching for it, even imperfectly, accelerates its acquisition and deepens its integration into your thinking.

And the fourth - perhaps the most underrated - is developing a sensitivity to the words you overuse. Most people have a small set of words they reach for habitually, regardless of whether they're precise. "Interesting." "Challenging." "Passionate." "Impactful." Each of these is doing the work of twenty more precise words that have been left on the bench. Noticing your defaults and asking whether a more specific word exists is a practice in itself. Usually one does exist, and finding it sharpens both the expression and the underlying thought.

The closing argument

I want to end this series where it started: with the claim that language shapes reality, not just describes it. In Part 1, that was a philosophical argument. In Part 2, it was a historical one. Here, it's a personal and practical one.

The words you have are, in a meaningful sense, the thoughts you can think. Not in the deterministic, limiting sense that the strong Sapir-Whorf hypothesis proposed - human beings are more creative than that, and we routinely think things we struggle to express. But in the looser, richer sense that your vocabulary determines the precision, speed, and reliability with which certain thoughts are available to you. A larger vocabulary doesn't make you more intelligent. It gives your intelligence more to work with.

To quote Pinker again,

"Language is above all a medium in which we express our thoughts and feelings, and it mustn't be confused with the thoughts and feelings themselves." Steven Pinker

That's the necessary caveat. But it doesn't undercut the argument - it clarifies it. The thoughts are real whether you have words for them or not. But with the words, you can do something with them. You can hold them steady, examine them, refine them, share them, argue about them, change your mind about them. Without the words, they slide.

Vocabulary development isn't about sounding educated. It isn't about winning arguments. It isn't about social positioning or intellectual one-upmanship. It's about having enough tools to do the thinking your life actually requires. And given that thinking is more or less everything - the quality of your decisions, your relationships, your work, your capacity to make sense of your experience - it seems worth taking seriously.

I bloody love words. I hope, at the end of this series, you love them a little more too.

Key Takeaways

1. Your vocabulary is not a social trophy - it's a cognitive instrument. The words you have in active use are the tools with which you think. More precise vocabulary enables more precise thinking, not as a performance but as a functional upgrade to how you process experience.

2. Emotional vocabulary is regulatory vocabulary. The research of Marc Brackett on emotional granularity, which I've discussed before in the context of leadership, has a personal dimension worth taking seriously here: naming an emotion with precision activates different neural processes than sitting with a vague unease. The word is partly the antidote.

3. Some concepts are practically inaccessible without their names. "Sunk cost fallacy," "cognitive dissonance," "confirmation bias" - these aren't just labels for things you already knew. They're shortcuts into concepts that are genuinely hard to apply in real time without the vocabulary. Professional frameworks are cognitive tools in disguise.

4. Vocabulary is an equity issue, not just an individual one. The correlation between socioeconomic background and vocabulary range is well-documented and consequential. The words children arrive with shape what they can access intellectually. Treating vocabulary development as mere personal improvement obscures a structural problem that deserves structural attention.

5. Plain language in communication and rich language in thinking are not in conflict. Orwell was right that clarity is a form of respect for your audience. That's compatible with building a rich internal vocabulary - because the goal in both cases is precision, not performance.

6. Vocabulary grows through use, not study. The most effective approach is not memorising word lists but reading widely, pausing on unfamiliar words, using new vocabulary actively, and noticing the words you habitually overuse. Deliberate acquisition over time changes how you think. There is no shortcut, but the compounding is real.