水蒸汽 shuǐzhēngqì water vapor Origin Definitions Defs Strokes Stroke Words Sentences Sents 水 shuǐ noun water water; a liquid, juice, or lotion蒸汽 zhēngqì noun steam water vapor produced when water boils or evaporates; specifically refers to water in a gaseous state, as opposed to the broader term 蒸气 zhēngqì which includes other gases like mercury vapor