汽 is a Japanese kanji written with 7 strokes, listed here under the keyword “vapor”. It is built from 水 (water) and 气 (steam). In Remembering the Kanji by James W. Heisig it is frame 2031.
On KumiJi Glyph Explorer, open the parts search and type “water” + “steam”. 汽 is among the results, together with every other character containing the same shapes.
Open 汽 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.