verb / noun

knock

NAHK/nɑːk/

A sharp blow or the sound it produces.

She knocks on the wooden door to get someone's attention.

A hand taps its knuckles against a wooden door to get attention.
Etymology

Cnocian already included knocking on a door, so the attention-getting action continues an old meaning. The word is likely imitative, echoing the sound of a blow.

In context

BareRose Garage2:37
I'll hold on to my isolator. Give it a couple thumps. And just knock all that rust off of there.
1968 Mercury Fuel Tank Restoration (pt 4) Day Two Boil Out the Rust with Electricity & Electrolysis!

More examples

  • Three sharp knocks at the door wake me.
  • Her only knock on the apartment is its tiny kitchen.
  • His confidence takes a knock after the rejection.
  • The engine knocks whenever I accelerate.

Forms

knock · knocks · knocked · knocking

knocker noun — A door fixture struck to announce visitors.

Similar words

tap
Usually suggests a lighter, gentler strike than a knock.
bang
Suggests a louder sound or more forceful blow.
strike
Names the act of hitting without necessarily emphasizing sound.