徹 is a Japanese kanji written with 15 strokes, listed here under the keyword “penetrate”. It is built from 育 (bring up), 彳 (step) and 攵 (rap). In Remembering the Kanji by James W. Heisig it is frame 951.
On KumiJi Glyph Explorer, open the parts search and type “bring up” + “step” + “rap”. 徹 is among the results, together with every other character containing the same shapes.
Open 徹 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.