- 敲，击，打；撞：
to knock somebody on the head
打某人的头
to knock a ball out of the field
把球击出场地
- 使碰撞：
He knocked his head against the wall.
他的头撞到了墙上。
- 敲掉，打掉；拆掉；拍去：
She knocks the dust out of her coat.
她打掉外套上的尘土。
They are knocking the wall down.
他们正在拆掉那堵墙。
- 敲成，敲出：
to knock a hole in a wall
在墙上敲出一个洞
- 去除，祛除(疾病)：
The medicine is effective for knocking colds.
这种药祛除感冒很有效。
- [美国口语]找…的岔子，吹毛求疵，挑剔；非难，抨击：
Don't knock it unless you can do better.
除非你自己能做得更好，否则不要吹毛求疵。
- [英国俚语]使震惊，给…以强烈印象：
What knocks me most is his ignorance.
最让我吃惊的是他的无知。