叩 ㄎㄡ ˋ kòu 头 ㄊㄡ ˊ tóu 叩 ㄎㄡ ˋ kòu 頭 ㄊㄡ ˊ tóu to kowtow (traditional greeting, esp. to a superior, involving kneeling and pressing one's forehead to the ground) also written 磕頭|磕头[ke1 tou2]