If you know the meaning of these 10 uncommon words, you’re smarter than most adults

by Lachlan Brown | May 4, 2026, 5:25 pm

Research in cognitive science suggests that words shape how we think.

Expand your vocabulary and you often expand your worldview.

Not in a pretentious “use big words to sound smart” way, but in a practical, everyday way. The right word can help a person notice a nuance, label a feeling, or make a cleaner decision.

Below are 10 uncommon words worth knowing. If you recognize them already, you’re ahead of the curve.

If you don’t, you will by the end, and you’ll see how each one quietly boosts your thinking, your relationships, and your career.

1. Sonder

Ever sat in a café and suddenly realized that every person around you has a life as complicated as yours?

That lightning-bolt of empathy is sonder, the awareness that everyone has their own intricate inner world.

Why it matters: Sonder makes you kinder. You become slower to judge and quicker to understand. Arguments soften when you remember there is a backstory you cannot see.

Try it in a sentence: “On the train, a wave of sonder hit me and I put my phone down, just watching life unfold.”

Mindfulness trick: Next time you feel irritated, picture three unseen chapters in the other person’s story. It becomes much harder to stay self-righteous after that.

2. Liminal

Liminal describes an in-between state, no longer what you were, not yet what you will become.

Think of graduation week, the first month in a new city, or the quiet moments before a big decision.

Why it matters: We rush liminal spaces. Real growth often lives here. The discomfort is a signal to pay attention rather than a stop sign that says to retreat.

Try it in a sentence: “That year between jobs was liminal, and it remade me.”

3. Aporia

Aporia is a moment of puzzlement, when your assumptions collapse and you have to think again. Socrates loved aporia. It is the fertile ground where better questions appear.

Why it matters: Smart people are not the ones with all the answers. They are the ones who can sit in aporia without panicking. In business and relationships, “I don’t know yet” is often the bravest sentence.

Try it in a sentence: “Her feedback left me in aporia, and that confusion pushed me to redesign the whole project.”

Practice: When something breaks your mental model, write down three new hypotheses before you defend the old one.

4. Apophenia

Apophenia is our tendency to see patterns that are not really there. It is a cousin to superstition and conspiracy thinking, and it also shows up in harmless ways, such as spotting faces in clouds.

Why it matters: Your brain is a pattern machine. That is useful, but it can also lead you astray. Knowing the word helps you catch yourself before you connect dots that do not belong together.

Try it in a sentence: “The stock’s wiggles looked meaningful, but it was just my apophenia kicking in.”

Pro move: Ask, “What evidence would disconfirm this pattern?” If you cannot find any, you are probably inside apophenia.

5. Eudaimonia

Aristotle used eudaimonia to mean a flourishing life, a deeper and steadier form of happiness built on virtue, purpose, and good habits.

Why it matters: Chasing dopamine spikes is easy. Designing for eudaimonia takes intention and patience, and it is far more satisfying. Think meaningful work, strong ties, and contribution.

Try it in a sentence: “Sprinting for trophies burned me out; crafting a rhythm for eudaimonia brought me peace.”

Practical tip: Each Sunday, plan one action for competence, one for connection, and one for contribution. That trio feeds eudaimonia.

6. Saudade

Saudade is a Portuguese word for a bittersweet longing, a tender ache for something or someone you miss, even if it is not coming back.

Why it matters: We often pathologize sadness. Saudade validates the emotion as part of a full life. When you can name it, you can feel it without drowning in it.

Try it in a sentence: “A song from 2012 hit me with saudade for a version of myself I have outgrown.”

Mindfulness move: Let the feeling pass through. Do not fix. Do not scroll. Simply breathe and witness. Paradoxically, that is how it loosens its grip.

7. Syzygy

Astronomers use syzygy for perfect alignment, such as the sun, moon, and earth during an eclipse.

It is a mouthful, and it is a beautiful reminder that occasional alignment is not random. Alignment is the result of consistent orbits.

Why it matters: In your life, syzygy moments happen when values, timing, and effort line up. You cannot force them, but you can set your orbit—which means habits, priorities, and boundaries—so alignment happens more often.

Try it in a sentence: “When the right mentor met the right project at the right time, we had career syzygy.”

Action: Define your orbit in one sentence. Something like: “Write each morning, move each afternoon, protect deep work.” Alignment tends to follow structure.

8. Petrichor

Petrichor is that earthy, nostalgic smell when rain hits dry ground. If you like the nerdy version, it comes from plant oils and geosmin released from soil.

Why it matters: Tiny joys matter. Naming them turns the mundane into a moment. That attention to detail spills into your work and relationships.

Try it in a sentence: “The first storm of summer rolled in and the petrichor took me straight back to childhood.”

Ritual: Keep a “small delights” note on your phone. Petrichor, sun through leaves, a warm mug on a cold day. The practice trains gratitude.

9. Palimpsest

A palimpsest was a manuscript page scraped clean and written over, yet traces of the old text remain. The metaphor is gold. Cities, relationships, and identities are palimpsests.

Why it matters: You are not a blank slate each January. You are a layered one. Seeing yourself as a palimpsest creates compassion for your past selves and patience for your edits.

Try it in a sentence: “This neighborhood is a palimpsest, old brick stories beneath the glass towers.”

Reflection: When you rewrite a habit, expect echoes of the old text. That is normal. Keep writing. You will become more legible to yourself over time.

10. Equanimity

Equanimity is calm balance, especially under stress. In Buddhist practice, it is the steady middle that lets you love deeply without clinging and act decisively without reacting.

Why it matters: Anxiety shrinks your options. Equanimity expands them. Leaders with equanimity make cleaner calls. Parents with equanimity co-regulate their kids. Partners with equanimity argue without turning a disagreement into a war.

Try it in a sentence: “I replied with equanimity instead of firing off a snarky email, and the whole issue dissolved.”

How to build it: Breath first, story second. A simple 4–6 breathing rhythm before responding when tensions rise can prevent more than one self-inflicted mess.

Words are not just labels. Words are levers. The right term lets you pull on the right mental model.

You notice more. You choose better. You connect deeper.

Here is what ties these ten together:

  • Sonder, saudade, and equanimity sharpen emotional intelligence.
  • Liminal, aporia, and palimpsest help you navigate change and uncertainty.
  • Apophenia and eudaimonia refine your thinking and goal-setting.
  • Syzygy and petrichor remind you to notice beauty and alignment in everyday life.

Psychology research consistently shows that people with richer vocabularies tend to score higher on measures of critical thinking and emotional awareness. It is not that the words make someone smarter overnight—it is that each new term offers a new lens, and new lenses reveal details that were always there but previously went unnoticed.

So the next time an unfamiliar word catches your eye, do not skip past it. Look it up. Try it out. Let it reshape how you see the world, one precise thought at a time.

Lachlan Brown

Lachlan Brown is an entrepreneur and co-founder of Brown Brothers Media, a digital publishing network reaching tens of millions of readers monthly. He holds a Graduate Diploma of Psychological Studies from Deakin University, though his real education came afterward: a warehouse job shifting TVs, a stretch of anxiety in his mid-twenties, and the slow discovery that studying the mind is not the same as learning how to live well. He started experimenting with Buddhist principles during breaks at the warehouse and eventually began writing about what he was learning. That writing became Hack Spirit, a widely read personal development site, and his book Hidden Secrets of Buddhism became a bestseller. His work breaks down complex ideas into frameworks people can apply immediately, whether they are navigating a career change, a difficult relationship, or the gap between knowing what to do and actually doing it. Lachlan splits his time between Singapore and Saigon. He writes about high-performance routines, decision-making under pressure, digital innovation, and the intersection of Eastern philosophy with modern life. His perspective comes from having built things from scratch, failed at some of them, and learned that clarity comes from practice, not theory.