knock

Noun

• the act of hitting vigorously
  • he gave the table a whack
    

• a bad experience
  • the school of hard knocks
    

• a vigorous blow
  • the sudden knock floored him
    
  • he took a bash right in his face
    
  • he got a bang on the head
    

• negative criticism

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

Verb

• 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
    

• 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
    

• make light, repeated taps on a surface
  • he was tapping his fingers on the table impatiently
    

• knock against with force or violence
  • My car bumped into the tree
    

• rap with the knuckles
  • knock on the door
    

• deliver a sharp blow or push :"He knocked the glass clear across the room"

Related words

• Synonyms: 
  belt , rap , whack , whang , bash , bang , smash , roast , knocking , criticize , criticise , pick apart , pink , ping , tap , bump , strike hard