开 ㄎㄞ kāi 裆 ㄉㄤ dāng 裤 ㄎㄨ ˋ kù 開 ㄎㄞ kāi 襠 ㄉㄤ dāng 褲 ㄎㄨ ˋ kù open pants (for infants before toilet training)