Compound of 衣(い) (i, “clothing”) + 食(しょく) (shoku, “food”) + 住(じゅう) (jū, “shelter”).
衣(い)食(しょく)住(じゅう) • (ishokujū) ←いしよくぢゆう (isyokudyū)?
衣食住 • (uisikju) (hangeul 의식주)