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volatile

/ˈvɑːlətl//ˈvɒlətaɪl/·adjective
liable to change suddenly and violently; explosively unstable
Fig. 1 — I watch a sky that won't hold still.
01Definition

Volatile began as chemistry — from the Latin volare, 'to fly': a volatile liquid is one whose molecules escape into the air at the slightest warmth. Every figurative sense keeps that readiness to fly out of stillness: volatile markets, volatile tempers, volatile borders. What makes something volatile is not constant motion but untrustworthy calm — the surface can lie flat for months and detonate in an afternoon, and the quiet beforehand was indistinguishable from real peace.

02In use
  • iA volatile mix of unemployment and stagnant wages fueled the unrest.
  • iiPetrol is highly volatile, evaporating quickly even at room temperature.
  • iiiCryptocurrency prices are notoriously volatile — they fluctuate hourly and can halve overnight.
03Collocations
  • a volatile market
  • highly volatile
  • a volatile situation
  • volatile compounds
  • a volatile temper

Family volatility (noun)

04Relations

=unstable, explosive, erratic, unpredictable, mercurial

≠stable, steady, inert

05Compared
PairThe difference
volatile vs fluctuatethe up-and-down movement, as a verb → fluctuate; the trait of swinging suddenly and violently, as an adjective → volatile.
volatile vs stableit holds its state → stable; a quiet that can suddenly blow up → volatile.
06TOEFL & IELTS

Two exam lives: TOEFL chemistry passages use the literal sense — volatile compounds evaporate — while economics and politics passages use the figurative one, with 'volatility' as the noun of record. In IELTS Task 1, a wildly zigzagging line is 'highly volatile', the summary word for what 'fluctuated sharply' describes. Pronunciation split worth hearing once: US /ˈvɑːlətl/ ends like 'total'; UK /ˈvɒlətaɪl/ rhymes with 'mile'.

07Asked
How do you pronounce volatile — US vs UK?
This is a genuine transatlantic split. American English says VOL-uh-tl, the last syllable weak and rhyming with the end of 'total'. British English says VOL-uh-tile, the last syllable stressed enough to rhyme with 'mile'. Both are correct; pick the one that matches your accent. The noun volatility is friendlier — vol-uh-TIL-uh-tee, said much the same on both sides.
What does volatile mean?
Liable to change suddenly and violently — but the key is that it does not mean constant motion. What makes something volatile is untrustworthy calm: the surface can lie flat for months and detonate in an afternoon. The scene above is that exactly — a sky that turns from sun to storm to hail and back without warning, where every calm spell looks like real peace and means nothing.
What is the difference between volatile and unstable?
Unstable means not firmly fixed — liable to fall or fail at any time. Volatile adds suddenness and violence: not just wobbly but ready to fly out of stillness and erupt. An unstable ladder might slowly give way; a volatile situation explodes without warning. All volatile things are unstable, but volatile carries the extra charge of a calm that can detonate.
What does 'volatile' mean in chemistry?
Readily evaporating — a volatile substance has a high vapour pressure and turns to gas easily, even at room temperature: petrol, alcohol, perfume. This is the word's original sense, from Latin volare, 'to fly', the molecules flying off into the air. Every figurative use borrows that image of something poised to escape its liquid stillness — which is why a volatile temper is one always ready to flare into the open.
What does it mean to describe a person as volatile?
Prone to sudden, unpredictable changes of mood — calm one moment and furious the next, with little warning between. A volatile person keeps others on edge precisely because the quiet is not to be trusted. The word is stronger and more alarming than 'moody' or 'temperamental': it implies the shift can be swift and explosive, the emotional weather turning like the sky in the scene above.