脚印
jiǎo yìn · HSK 6
footprint
👣 jiǎo = foot + yìn = print/stamp — literally foot-stamp
脚 means foot and 印 means seal, stamp, or mark. A footprint is just a foot-stamp pressed into the ground. The character 印 is the same one used for 印章 (seal/chop), so think of your foot leaving its official mark.
脚 — meat radical 月(肉) + 却 (phonetic)
脚 is a semantic-phonetic compound. The left side 月 is the 'flesh/body' radical (from 肉), marking it as a body part. The right side 却 supplies the sound. Originally it referred to the lower leg or shin, and later broadened to mean 'foot' or 'leg' generally.
印 — hand 爪 (claw) + kneeling person 卩
Originally a pictograph showing a hand pressing down on a kneeling figure, depicting the act of stamping or sealing. The meaning extended from 'to press a seal' to the seal itself, and then to 'print' or 'imprint' in modern usage.