The sound of knocking (as on a door or in an engine or bearing):
— The knocking grew louder.

synonym: knocking.

Dutch: aankloppen, kloppen
Polish: pukanie

Negative criticism.

synonym: roast.

Dutch: klap

A vigorous blow:
— The sudden knock floored him.

synonyms: bang, bash, belt, smash.

Polish: gwizdnięcie

A bad experience.

The act of hitting vigorously.

synonyms: belt, rap, whack, whang.

Roget 276: impulse, impulsion, impetus; momentum; push, pulsion^†, thrust, shove, jog, jolt, brunt, booming, boost [U.S.], throw; explosion etc. (violence) 173; propulsion etc. 284.    percussion, concussion, collision, occursion^†, clash, encounter, cannon, carambole^†, appulse^†, shock, crash, bump; impact; elan; charge etc. (attack) 716; beating etc. (punishment) 972.    blow, dint, stroke, knock, tap, rap, slap, smack, pat, dab; fillip; slam, bang; hit, whack, thwack; cuff etc. 972; squash, dowse, swap, whap^†, punch, thump, pelt, kick, punce^†, calcitration^†; ruade^†; arietation^†; cut, thrust, lunge, yerk^†; carom, carrom^†, clip [Slang], jab, plug [Slang], sidewinder [U.S.], sidewipe^†, sideswipe [U.S.].    hammer, sledge hammer, mall, maul, mallet, flail; ram, rammer^†; battering ram, monkey, pile-driving engine, punch, bat; cant hook; cudgel etc. (weapon) 727; ax etc. (sharp) 253.    [Science of mechanical forces] dynamics; seismometer, accelerometer, earthquake detector.    ... show more

Polish: stuknięcie, puknięcie

Deliver a sharp blow or push:
— He knocked the glass clear across the room.

synonym: strike hard.

Roget 863: be rash etc. adj.; stick at nothing, play a desperate game; run into danger etc. 665; play with fire, play with edge tools.    carry too much sail, sail too near the wind, ride at single anchor, go out of one's depth.    take a leap in the dark, buy a pig in a poke.    donner tete baissee [Fr.]; knock, one's bead against a wall etc. (be unskillful) 699; rush on destruction; kick against the pricks, tempt Providence, go on a forlorn hope, go on a fool's errand.    reckon one's chickens before they are reckon one's chickens before they are hatched, count one's chickens before they are hatched, reckon without one's host; catch at straws; trust to a broken reed, lean on a broken reed.    ... show more

Rap with the knuckles.

Dutch: bekloppen, kloppen

Knock against with force or violence.

synonym: bump.

Make light, repeated taps on a surface.

synonyms: pink, rap, tap.

Roget 406: rap, snap, tap, knock, ping; click; clash; crack, crackle; crash; pop; slam, bang, blast, boom, clap, clang, clack, whack, wham; brustle^†; burst on the ear; crepitate, rump.    blow up, blow; detonate.    ... show more

Roget 276: give an impetus etc. n.; impel, push; start, give a start to, set going; drive, urge, boom; thrust, prod, foin [Fr.]; cant; elbow, shoulder, jostle, justle^†, hustle, hurtle, shove, jog, jolt, encounter; run against, bump against, butt against; knock one's head against, run one's head against; impinge; boost [U.S.]; bunt, carom, clip y; fan, fan out; jab, plug [Slang].    strike, knock, hit, tap, rap, slap, flap, dab, pat, thump, beat, blow, bang, slam, dash; punch, thwack, whack; hit hard, strike hard; swap, batter, dowse^†, baste; pelt, patter, buffet, belabor; fetch one a blow; poke at, pink, lunge, yerk^†; kick, calcitrate^†; butt, strike at etc. (attack) 716; whip etc. (punish) 972.    come into a collision, enter into collision; collide; sideswipe; foul; fall foul of, run foul of; telescope.    throw etc. (propel) 284.    ... show more

Dutch: hameren

Sound like a car engine that is firing too early.

synonyms: ping, pink.

Find fault with; express criticism of; point out real or perceived flaws:
— Don't knock the food--it's free.

synonyms: criticise, criticize, pick apart.

Dutch: kritiseren, beoordelen, bekritiseren