室 is a Japanese kanji written with 9 strokes, listed here under the keyword “room”. It is built from 至 (climax) and 宀 (roof). In Remembering the Kanji by James W. Heisig it is frame 816.
On KumiJi Glyph Explorer, open the parts search and type “climax” + “roof”. 室 is among the results, together with every other character containing the same shapes.
Open 室 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.