First opened Tuesday, June 12, 2007
水蒸気
すいじょうき
Pitch accent: We don't have the data for this section. No accent list gives this spelling and reading, or the two we check against disagree.
water vapor, steam
Suijōki is 水 (sui, “water”) plus 蒸気 (jōki, “steam, vapor”).
Taken apart
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Wiktionary's text doesn't split this word, so each part is one of its kanji (with the okurigana written after it), with the reading and the dictionary meaning KANJIDIC2 gives that character — a word doesn't always use every sense of its kanji.
In a sentence
熱は水を水蒸気に変える。
Heat turns water into steam.
水は沸騰すると水蒸気になる。
Water turns into steam when it is boiled.
Sentences are from Tatoeba (CC BY 2.0 FR), picked by fixed rules from a dated export and shown unchanged. Nobody has reviewed them one by one.
What Wiktionary says
Quoted line by line from Wiktionary's Etymology section for this reading, taken from one dated dump so it can't change underneath us. Nothing below is paraphrased.
- “From 水 (sui, "water," "cold water) + 蒸気 (jōki, "steam," "vapor").”
Source: Wiktionary: 水蒸気 (dump of 2026-09-02), available under CC BY-SA 4.0. Reading, meaning and part of speech from JMdict, and kanji readings from KANJIDIC2 (EDRDG).
What the labels mean
- 漢語 Sino-Japanese
- Words built from Chinese-derived morphemes — borrowed from Chinese or coined in Japan out of Chinese parts — read with on'yomi.
- Compound
- Two or more words or stems joined into one.