磨 is a Japanese kanji written with 16 strokes, listed here under the keyword “grind”. It is built from 麻 (hemp) and 石 (stone). In Remembering the Kanji by James W. Heisig it is frame 638.
On KumiJi Glyph Explorer, open the parts search and type “hemp” + “stone”. 磨 is among the results, together with every other character containing the same shapes.
Open 磨 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.