水蒸気(すいじょうき)

すいじょうき
noun
steam; water vapor
academicweather
1. steam; water vapor
Water in its gaseous state, produced by heating or boiling. Used in both scientific and everyday contexts for the invisible gas or the visible mist produced when water evaporates or boils.
お湯(ゆ)から水蒸気(すいじょうき)が上(あ)がっている。
Steam is rising from the hot water.
水蒸気(すいじょうき)が冷(ひ)えて水滴(すいてき)になった。
The water vapor cooled and turned into droplets.
火山(かざん)の噴火口(ふんかこう)からは大量(たいりょう)の水蒸気(すいじょうき)が噴出(ふんしゅつ)していた。
A large amount of steam was gushing from the volcanic crater.

Usage

In everyday Japanese, 水蒸気(すいじょうき) refers to both the invisible gaseous state of water and the visible white mist (which is technically tiny water droplets). In scientific usage, 水蒸気(すいじょうき) strictly means the invisible gas. The word 湯気(ゆげ) is the everyday term for visible steam rising from hot liquids.

Common collocations

Related Words

Compare: 湯気(ゆげ) (steam)
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Added 2026.2.24 16:28 · Revised 2026.9.2 13:01
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