knock

Sense 1 noun

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

the knocking grew louder

Sense 2 verb

deliver a sharp blow or push :

He knocked the glass clear across the room

Sense 3 noun

negative criticism

Sense 4 verb

rap with the knuckles

knock on the door

Sense 5 noun

a vigorous blow

the sudden knock floored him

Sense 6 verb

knock against with force or violence

My car bumped into the tree

Sense 7 noun

a bad experience

the school of hard knocks

Sense 8 verb

make light, repeated taps on a surface

he was tapping his fingers on the table impatiently

Sense 9 noun

the act of hitting vigorously

he gave the table a whack

Sense 10 verb

sound like a car engine that is firing too early

the car pinged when I put in low-octane gasoline

Sense 11 verb

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

The paper criticized the new movie