靴 shoe

革 (leather/revolution) + 化 (transform) Same-ON

★★★☆☆

13 strokes

Onyomi

KA

Mnemonic

Leather is transformed into shoes by the shoemaker.

Kunyomi

くつ	shoes KANA ★★★☆☆

Jukugo

靴下(くつした)

socks ★★★☆☆ KUNKUN KANA
靴 (shoe) + 下 (below) = 靴下 (socks)