vapor
(British vapour)
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noun
a substance diffused or suspended in the air, especially one normally liquid or solid:
蒸気〘空気中に漂う微細な水分; 湯気･雲など〙
e.g. dense clouds of smoke and toxic vapor
e.g. chemical vapors.
Physics a gaseous substance that is below its critical temperature, and can therefore be liquefied by pressure alone. Compare with gas.
〘物理〙 蒸気〘液体･固体が気化したもの〙
(the vapors) dated a sudden feeling of faintness or nervousness or a state of depression.
｟古｠ ; 〖the ～s〗 憂鬱症
verb no object
talk in a vacuous, boasting, or pompous way:
e.g. he was vaporing on about the days of his youth.
DERIVATIVES
vaporous |ˈvāp(ə)rəs| adjective
vaporousness |ˈvāpərəsnəs| noun
vapory |ˈvāpərē| adjective
ORIGIN
late Middle English: from Old French, or from Latin vapor ‘steam, heat’. The current verb sense dates from the early 17th century.