knock
//nɒk//
Verb
knockInfinitive
knockPresent tense
knockedPast tense
knockedPast participle
knockingPresent participle
knocksThird-person singular
1
To strike a surface with a sharp blow, especially to attract attention or gain entry.
Someone is knocking at the door.
2
To collide with or strike something forcefully.
I knocked my head on the low ceiling.
3
To criticize or disparage someone or something.
Don't knock it until you've tried it.
4
To cause to move or fall by striking.
He knocked the ball off the table.
Noun
1
A sharp blow or the sound produced by striking a surface.
There was a loud knock at the door.
2
A critical or disparaging remark.
That article was full of knocks against the government.