knee/ niː /

1.noun [c] 
膝盖

2.vt.
用膝盖撞击

to bring sb to his/her knees
迫使某人屈服
(to sit/be) on sb's knee
( 坐 )在某人的膝上
to be on one's knees
跪着
to fall to one's knees
跪倒