腰 is a Japanese kanji written with 13 strokes, listed here under the keyword “loins”. It is built from 月 (month) and 要 (need). In Remembering the Kanji by James W. Heisig it is frame 1731.
On KumiJi Glyph Explorer, open the parts search and type “month” + “need”. 腰 is among the results, together with every other character containing the same shapes.
Open 腰 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.