knock

B1 · Intermediate

v. to hit something by accident, often causing it to move or fall.

v. to strike or collide with something, often resulting in displacement or damage.

日本語:ぶつける※

“Be careful not to knock that vase off the table with your bag.”

“The cyclist was nearly knocked off his bike when a car door opened suddenly in his path.”

B2 · Upper Intermediate Informal

v. to say negative things about something or someone.

v. to criticize or disparage something, often unfairly or habitually.

日本語:叩く※

“Don't knock it until you've tried it; the food is actually quite good.”

“Critics were quick to knock the director's latest film, though audiences seemed to appreciate its unconventional pacing.”

A2 · Elementary Countable noun

n. the sound made when someone hits a door or surface.

n. the sound produced by a sharp blow or rap against a hard surface.

“There was a loud knock at the door just as we sat down for dinner.”

“A sharp, rhythmic knock echoed through the hallway, startling the residents who were not expecting visitors so late.”

B2 · Upper Intermediate Countable noun Informal

n. a difficult experience or a failure that hurts your progress.

n. a figurative blow, setback, or unfortunate experience that affects one's confidence or progress.

“Losing his job was a big knock to his confidence.”

“The company took a serious knock when its main competitor released a cheaper, more efficient version of the same product.”

C2 · Proficiency Countable noun Science Technical

n. a metallic sound in a car engine that shows something is wrong.

n. a characteristic metallic sound in an internal combustion engine caused by improper combustion.

“The mechanic said the knock in the engine was caused by low-quality fuel.”

“Persistent engine knock can lead to significant mechanical failure if the timing of the spark ignition is not adjusted immediately.”