knock

This word can be a verb or a noun when someone uses a hand or other object to hit a surface for the purpose of gaining someone’s attention.

Pronunciation: The “k” is silent. The word “knock” begins with an “n” sound and rhymes with sock, rock, and jock.

If you knock on the door, someone will answer it.

This common verb is used when someone tries to get the attention of another person by creating a sound, usually on doors and windows.

Use “knock” when someone hits against an object, accidentally or intentionally.

A little boy knocked over a glass in the cafe and broke it.
Developers are going to knock down that beautiful old hotel to build a parking lot.
Another driver knocked into Remi’s car and caused some damage to the front end.
Football players knock against each other as they are playing.

The Twin Towers in New York were knocked down when terrorists flew airplanes into them.

A knock is often a sound that is made for gaining the attention of another person.

There was a knock on the door.
Did you hear that knock?
Give it a knock.
That was a loud knock.
The car is making a knocking sound.
Where is that knocking sound coming from?
Vanessa brought her car to a mechanic because there’s some kind of a knock in the engine.

A knock can also be a from of criticism. If you knock something, you are making comments that are critical or unkind.

Her comments were definitely a knock on the performance.
You shouldn’t knock other people, especially if you don’t completely understand their circumstances.
That was clearly a knock against the ideas presented.
I don’t mean to knock your suggestion, but where will the money come from to do this?
Don’t knock it until you have tried to it. (This is a popular expression. Don’t say something is bad unless you have direct experience with it.)