vapour
UK/'veipә/US
C1
Definitions
n.
Mist, steam, or fumes suspended in the air; a substance in gaseous form
蒸气，水汽；雾气
v.
To rise or be given off as vapour; to evaporate
蒸发，化为蒸气
Root Breakdown
Root-derived=vapour
The root standing alone. vapour is the British spelling; vapor is American. It names the visible mist itself — water vapour, the cloud over a kettle, the haze above hot tarmac.
Root vapor still carries 5 more wordsUsage Guide
Spelling: British vapour vs American vapor — same word, choose one consistently. As a noun it is usually uncountable (water vapour). The verb sense ('to vapour') is rare today; evaporate is the normal verb.
Example Sentences
- 1.
Water vapour condenses on the cold window.
- 2.
Clouds of vapour rose from the hot spring.
- 3.
The chemical gives off a toxic vapour.