襯しん衣いしんいじ字FuriganaMeanings1noununderwear; undershirtRefers to a garment worn next to the skin under outer clothing; can be a shirt-like undergarment. The term is somewhat formal or literary; in everyday speech, 下着 (したぎ) is more common.彼かれは襯しん衣いを着き替がえた。He changed his underwear.この襯しん衣いは肌はだ触ざわりが良よい。