knock

n.敲，敲打；碰撞 v.敲，打；碰，撞击

knees-up, knell, knew, knick-knack (also nick-nack), knickerbockers, knickers, knife, knife-edge, knight, knight errant (pl knights errant), knighthood, knightly, knit, knitter, knitting, knitting-machine, knitting-needle, knitwear, knob, knobbly, knock (sth) on, knock down, knock off, knock off (sth), knock out, knock sb down, knock sb out, knock sb/sth over, knock sth back, knock sth in; knock sth into sth, knock sth together, knock up, knock up against, knock-down, knock-kneed, knock-on, knock-out, knock-up, knockabout, knocker,