knock
noun
the sound of knocking (as on a door or in an engine or bearing)
“the knocking grew louder”
Synonymsknockingnegative criticism
Synonymsroasta vigorous blow
“the sudden knock floored him”
“he took a bash right in his face”
a bad experience
“the school of hard knocks”
the act of hitting vigorously
“he gave the table a whack”
verb
deliver a sharp blow or push
“He knocked the glass clear across the room”
Synonymsstrike hardrap with the knuckles
“knock on the door”
knock against with force or violence
“My car bumped into the tree”
Synonymsbumpmake light, repeated taps on a surface
“he was tapping his fingers on the table impatiently”
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”
find fault with; express criticism of; point out real or perceived flaws
“The paper criticized the new movie”
“Don't knock the food--it's free”
Source: WordNet 3.1, Princeton University
