"knocking" in the noun sense

1. knock, knocking

the sound of knocking (as on a door or in an engine or bearing

"the knocking grew louder"

"knocking" in the verb sense

1. knock, strike hard

deliver a sharp blow or push

"He knocked the glass clear across the room"

2. knock

rap with the knuckles

"knock on the door"

3. bump, knock

knock against with force or violence

"My car bumped into the tree"

4. tap, rap, knock, pink

make light, repeated taps on a surface

"he was tapping his fingers on the table impatiently"

5. pink, ping, knock

sound like a car engine that is firing too early

"the car pinged when I put in low-octane gasoline"

"The car pinked when the ignition was too far retarded"

6. knock, criticize, criticise, pick apart

find fault with express criticism of point out real or perceived flaws

"The paper criticized the new movie"

"Don't knock the food

Source: WordNet® (An amazing lexical database of English)

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