硬 is a Japanese kanji written with 12 strokes, listed here under the keyword “stiff”. It is built from 石 (stone) and 更 (grow late). In Remembering the Kanji by James W. Heisig it is frame 750.
On KumiJi Glyph Explorer, open the parts search and type “stone” + “grow late”. 硬 is among the results, together with every other character containing the same shapes.
Open 硬 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.