叩⇒ 叩 kòu, [敂], to knock/to kowtow, old variant of 叩[kòu]/to knock 叩击 叩首 kòushǒu, to kowtow/also written 磕頭|磕头[kē tóu] 叩头 kòutóu, [叩頭], to kowtow (traditional greeting, esp. to a superior, involving kneeling and pres... 叩门 kòumén, [叩門], to knock on a door