knocks

Sudden fatigue as a result of glycogen depletion from not having taken in enough nutrition.

An abrupt rapping sound, as from an impact of a hard object against wood.

“I heard a knock on my door.”

A sharp impact.

“He took a knock on the head.”

Criticism.

Preignition, a type of abnormal combustion occurring in spark ignition engines caused by self-ignition; also, the characteristic knocking sound associated with it.

A batsman's innings.

“He played a slow but sure knock of 35.”

To strike for admittance; to rap upon, as a door.

To criticize verbally; to denigrate; to undervalue.

“Don’t knock it until you’ve tried it.”

To kick a ball towards another player; to pass.

To impress forcibly or strongly; to astonish; to move to admiration or applause.

To bump or impact.

“I accidentally knocked my drink off the bar.”

To rap one's knuckles against something, especially wood.

“Knock on the door and find out if they’re home.”