Why Seek Out Unusual Words?

English contains an estimated quarter of a million distinct words — yet most of us cycle through the same few thousand. Expanding your vocabulary isn't just about impressing people; it's about gaining precision. Sometimes a rare word captures an experience so exactly that no common word comes close.

Here are ten rare but genuinely useful English words, with explanations of what they mean and how you might use them.

The Words

1. Sonder

Meaning: The realization that each passerby has a life as vivid and complex as your own.

Coined by the Dictionary of Obscure Sorrows, sonder has gained enough traction to feel essential. It names a feeling almost everyone has had but struggled to articulate.

2. Vellichor

Meaning: The strange wistfulness of used bookshops.

Another gem from the same source — perfect for any lover of old books and quiet afternoons.

3. Petrichor

Meaning: The pleasant, earthy smell that follows rain on dry ground.

This one is from actual scientific literature (coined in 1964 in Nature magazine). It's precise, evocative, and surprisingly useful in writing.

4. Hiraeth

Meaning: A deep longing for a home — or a version of a place — that no longer exists or perhaps never did.

Borrowed from Welsh, hiraeth (pronounced heer-eyeth) describes a bittersweet nostalgia with no perfect English equivalent.

5. Liminal

Meaning: Relating to a transitional or threshold state — physical, psychological, or temporal.

From the Latin limen (threshold). Useful when describing in-between spaces: airports, dawn, adolescence, waiting rooms.

6. Apophenia

Meaning: The tendency to perceive meaningful connections between unrelated things.

A psychological term that has filtered into everyday intellectual discussion — useful for writers, thinkers, and anyone analysing patterns.

7. Numinous

Meaning: Having a strong spiritual or mysterious quality; evoking a sense of the divine.

Used by philosopher Rudolf Otto, numinous fills a gap between "holy," "eerie," and "awe-inspiring."

8. Callipygian

Meaning: Having well-shaped buttocks.

From the Greek kallos (beauty) and pyge (buttocks). Less useful than the others, perhaps, but wonderfully specific — and it makes a great example of how Greek compounding works.

9. Velleity

Meaning: A mild desire or inclination that doesn't lead to action.

From the Latin velle (to wish). Perfect for describing the half-hearted ambitions most of us quietly harbour.

10. Kenopsia

Meaning: The eerie, forlorn atmosphere of a place that is usually busy but is now empty.

Think of a school corridor on a Sunday evening, or a stadium after a match. This word makes the invisible visible.

How to Actually Remember New Words

  • Use it within 24 hours. Write a sentence, say it aloud, or work it into a conversation.
  • Connect it to a memory. Associate the word with a vivid personal image or experience.
  • Keep a vocabulary journal. A simple notebook or app works — the act of writing cements memory.
  • Review spaced repetition. Revisit new words at increasing intervals (day 1, day 3, day 7, day 21).

Final Thought

Words like these don't just decorate writing — they give form to feelings and ideas that would otherwise remain foggy and inarticulate. Once you learn a word for something, you start noticing that thing everywhere.