ke1
to tap; to knock (against sth hard); to knock (mud from boots, ashes from a pipe etc)

ke4
variant of 嗑

strokes 15
radical
strokes after radical 10
磕磕 磕磕 ke1 ke1
(onom.) knocking

磕磕巴巴 磕磕巴巴 ke1 ke1 ba1 ba1
stammering; stuttering; not speaking fluently

磕磕绊绊 磕磕絆絆 ke1 ke5 ban4 ban4
bumpy (of a road); limping (of a person)

磕碰 磕碰 ke1 peng4
to knock against; to bump into; to have a disagreement; to clash

磕头 磕頭 ke1 tou2
to kowtow (traditional greeting, esp. to a superior, involving kneeling and pressing one's forehead to the ground)

磕膝盖 磕膝蓋 ke1 xi1 gai4
(dialect) knee

磕头如捣蒜 磕頭如搗蒜 ke4 tou2 ru2 dao3 suan4
lit. to kowtow like grinding garlic (idiom); fig. to pound the ground with one's head

死磕 死磕 si3 ke1
(coll.) to fight to the death