惰 is a Japanese kanji written with 12 strokes, listed here under the keyword “lazy”. It is built from 左 (left), 月 (month) and 忄 (heart). In Remembering the Kanji by James W. Heisig it is frame 676.
On KumiJi Glyph Explorer, open the parts search and type “left” + “month” + “heart”. 惰 is among the results, together with every other character containing the same shapes.
Open 惰 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.