What does 蒸気 mean?
蒸気 is a Japanese noun meaning “steam, vapor” in English. It can also be translated as “steamboat” depending on context. It is written as 蒸気 in kanji, じょうき in hiragana, and jouki in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
そのエンジンは蒸気で動く。
The engine is driven by steam.