also: しゃっきゃく
noun
Literary or formal term for bare feet; in everyday speech, 裸足 (はだし) is more common.
彼は赤脚で砂浜を歩いた。
He walked on the sandy beach with bare feet.
裸足 is the everyday word for bare feet; 赤脚 is a more literary or formal synonym.
Compound of 赤 (red, bare) and 脚 (leg, foot). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'bare feet'.