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单词 knock
释义
knock
verb
uk
/nɒk/us
/nɑːk/

knockverb(MAKE NOISE)

B1[I]
torepeatedlyhitsomething,producinganoise:
（反复地）敲，击，打
She knockedonthewindowtoattracthisattention.她敲敲窗想引起他的注意。
There's someone knockingon/atthedoor.有人在敲门。
Please knock beforeentering.进来前请先敲门。
[I]engineeringspecialized
If anengineis knocking, it isproducingarepeatedhighsoundeither because thefuelis notburningcorrectlyor because asmallpartisdamagedand isthereforeallowinganotherparttomoveinwaysthat it should not.
（发动机）发爆震声，砰砰作响
[I]
If something such as apipeknocks, it makes arepeatedhighsound.
（管子等）发碰撞声
More examples
  • Iwishhe'd knockinsteadof justbargingin.
  • He knockedquietlybeforeenteringtheroom.
  • She knocked on thetableto getourattention.
  • She never knocks before she comes in.
  • Knock threetimes, then I'llknowit's you.
SMART Vocabulary: related words and phrases
Hitting against objects accidentally and colliding
  • anti-collision
  • anti-shock
  • bang
  • bowlsomeoneover
  • bump
  • cannon
  • carom
  • catch
  • collision
  • crash
  • jog
  • pile(something)up
  • post-crash
  • run(something)intosomething/someone
  • runsomeone/somethingdown
  • scuff
  • slam
  • smash
  • smashsomethingup
  • strike
See more results »

You can also find related words, phrases, and synonyms in the topics:

Sounds made by objects, movement or impact

knockverb(HIT)

B1[I+ adv/prep,T]
tohit,especiallyforcefully, andcausetomoveorfall:
碰，撞；碰倒；撞倒
Heaccidentallyknocked thevaseoffthetable.他不小心把花瓶碰下了桌子。
She knocked herheadagainstthewallas shefell.她跌倒时头撞在墙上。
Who knockedoverthatmugofcoffee?谁打翻了那杯咖啡？
[+ obj + adj]Somethugknocked himunconscious/senseless.有个恶棍把他打昏了。
She took ahammerand knockedaholeinthewall.她拿锤子在墙上砸了一个洞。
knock into each other/knock through
If you knock tworoomsinto each other or knock tworoomsthrough, youremovethewallbetween them so that theyformoneroom.
把（两个房间）打通
More examples
  • Theforceof thewindknocked myhatoff.
  • I knocked over acupoftea.
  • Thechairknocked against thelamp.
  • She knocked herheadon thecupboarddoor.
  • Mind you don't knock theglassover.
SMART Vocabulary: related words and phrases
Hitting against objects accidentally and colliding
  • anti-collision
  • anti-shock
  • bang
  • bowlsomeoneover
  • bump
  • cannon
  • carom
  • catch
  • collision
  • crash
  • jog
  • pile(something)up
  • post-crash
  • run(something)intosomething/someone
  • runsomeone/somethingdown
  • scuff
  • slam
  • smash
  • smashsomethingup
  • strike
See more results »

You can also find related words, phrases, and synonyms in the topics:

Connecting and combining
Building: construction work & workers

knockverb(CRITICIZE)

[T]UKinformal
tocriticize,especiallyunfairly:
指摘；挑剔
Don't knock him - he's doing hisbest.别挑他的刺了——他已在竭尽全力了。
Thesaurus: synonyms, antonyms, and examples
to show disapproval of someone or something
  • criticizeHe criticized the government's handling of the crisis.
  • attackShe wrote an article attacking the judge and the way the trial had been conducted.
  • condemnShe was condemned for her comments about the candidate.
  • denounceThe government's economic policy has been denounced on all sides.
  • come under fireThe government programme has come under fire for mismanaging funds.
See more results »
SMART Vocabulary: related words and phrases
Disapproving & criticizing
  • anathematize
  • animadversion
  • aspersion
  • assail
  • aw
  • backbite
  • criticism
  • dim
  • fault
  • niggle
  • nitpick
  • nitpicking
  • peanut gallery
  • people who live in glass houses shouldn't throw stonesidiom
  • personalization
  • personalize
  • philippic
  • pick
  • sarky
  • tear
See more results »

Idioms

be knocking (on) 60, 70, etc.
knocksomeone'sblock off
knocksomethingon the head
knock (some) sense intosomeone
knocksomeonesideways/for six
knock on wood
knock 'em dead!
knock it off
knock spots offsomething
knock the bottom out ofsomething
More idioms
knock, knock!
you could have knocked me down/over with a feather

Phrasal verbs

knock around
knock around (something)
knocksomeonearound
knocksomeoneback (something)
knock back (something)
knocksomeonedown
knocksomeone/somethingdown
knocksomethingdown
knock off (something)
knocksomethingoff (something)
More phrasal verbs
knocksomethingoff
knocksomeoneoff
knocksomeoneout
knockyourselfout
knocksomethingout
knocksomethingout ofsomeone
knocksomeoneover
knocksomethingover
knocksomethingtogether/up
knock up
knocksomeoneup
knock
noun[C]
uk
/nɒk/us
/nɑːk/

knocknoun[C](NOISE)

asuddenshortnoisemade when someone or somethinghitsasurface:
敲击声
There was a knockat/onthedoor.有敲门声。
SMART Vocabulary: related words and phrases
Sounds made by objects, movement or impact
  • babble
  • blaze
  • chuff
  • click away
  • clicker
  • clinking
  • clunk
  • crump
  • gunshot
  • hiss
  • jangling
  • pip
  • plunk
  • putter
  • scrunch
  • sonic boom
  • squelch
  • tick
  • white noise
  • whoosh
See more results »

knocknoun[C](HIT)

theactof something hardhittingapersonor thing:
（重重的）一击，敲击
Hereceivedanastyknockontheheadfrom afallingslate.一块石板掉下来把他的头重重地砸了一下。
SMART Vocabulary: related words and phrases
Hitting against objects accidentally and colliding
  • anti-collision
  • anti-shock
  • bang
  • bowlsomeoneover
  • bump
  • cannon
  • carom
  • catch
  • collision
  • crash
  • jog
  • pile(something)up
  • post-crash
  • run(something)intosomething/someone
  • runsomeone/somethingdown
  • scuff
  • slam
  • smash
  • smashsomethingup
  • strike
See more results »

Idioms

the knock at/on the door
take/have a knock
(Definition ofknockfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

knock| American Dictionary

knock
verb
us
/nɑk/

knockverb(MAKE NOISE)

[I]
torepeatedlyhitsomething,producinganoise:
Someone is knocking at thedoor.
Janeknocked on thewindowtoattracthisattention.
[I]
If anengineis knocking, it makes arepeatednoisebecause of amechanicalproblem.

knockverb(MOVE)

[T]
topushinto something or someone, oftenforcefully,causingthe thing orpersontomove:
Aliceaccidentallyknocked thepotoff thetable.
Theblastknocked him off hisfeet.

knockverb(CRITICIZE)

[T]infml
tocriticize,esp.unfairly:
She knocks everysuggestionI make.

Idioms

knock it off
knock on wood

Phrasal verbs

knocksomethingoff(something)
knock downsomething/someone
knock downsomething
knock off(something)
knock outsomeone
knock outsomething/someone
knock oversomething/someone
(Definition ofknockfrom theCambridge Academic Content Dictionary© Cambridge University Press)

knock| Business English

knock
verb[T]
uk
/nɒk/us
tocauseasuddenandunexpectedchangein something such asprices:
Hisdownbeatassessmentknocked the company'ssharepriceenough toensurethat itfailedtorejointheFTSE100.
Analysts havewarnedthatpricecutsandslowingsaleswouldknockprofits.
toaffectsomeone or somethingbadly:
Thehotelandconferencesectorhas been knockedsidewaysby acatalogueofproblemsinrecentyears.
Manufacturingredundanciesin theareaareknockingbuyers'confidence.
be knocked by sthThefinancialmarketswerebadlyknocked by the week'spoliticalturmoil.
informal
tocriticizesomething or someone:
Critics may knock thecompany, but it's still a goodinvestment.
You can knock him for some things, but you have to give himcreditfor hisrecord.
come knockinginformal
tovisitortalkto someone inordertoaskfor something:
Weassistsmallcompaniesthatwanttoexpandtheircapabilities- if they come knocking, we don'tturnthem down.
knock on/at sb's doorinformal
totalkto apersonor anorganizationbecause youwantthem tohelpyou, or youwanttojointhem:
In the twoyearssince itlauncheditsfirstplan,nearly218,000investorshave knocked onitsdoor.
In 1911, 39percentof Britain'sworkingwomen weredomesticservants, now they are knocking at theboardroomdoor.
knock sth on the headUKinformal
topreventsomething fromhappening, or tofinallyfinishsomething:
Thecompanyknockedhousingmarketconcernson theheadwith a 32%risein full-yearprofits.
knock spots off sth/sbUKinformal
to be muchbetterthan something or someoneelse:
ThisingeniouscolourviewfinderknocksspotsoffcurrentLCDdisplays.
knock sth/sb into shapeinformal
to takeactionto get something or someone into goodcondition:
Hisarrivalon theboardhasfinallyknocked thecompanyintoshape.
knock the bottom out of sth
todamagesomethingseverely,especiallybydestroyingitssupport:
Theriseinmortgageratesreally knocked thebottomout of thehousingmarket.

Phrasal verbs

knock sb/sth back
knock sb down
knock sth down
knock sth from sth
knock off (sth)
knock off sth
knock sth off (sth)
knock sth out
knock
noun[C]
uk
/nɒk/us
asituationin which something isbadlyaffected:
Sales ofchampagnewere up over thekeyChristmasperioddespiteearlierfearsofa knock inconsumerconfidence.
informal
abadexperience:
take/suffer/have a knock
In him, weseea man,toughenedby hisshareofhard knocks, who's had tostrugglefor everysuccess.
acriticismof someone or something:
a knock on sb/sthThebiggestknock oninternetphonesis that they're only asreliableasyourbroadbandconnection.
(Definition ofknockfrom theCambridge Business English Dictionary© Cambridge University Press)

Examplesofknock

knock
Here theyknockout electrons from inner electronic shells of the atoms, producing core holes.
From theCambridge English Corpus
This finding sheds a critical light on the use of "organ scarcity" as a moralknock-out phrase.
From theCambridge English Corpus
However, in theknock-on source calculation, the thermal motion of background fuel ions was neglected.
From theCambridge English Corpus
Heterozygousknock-out mice for brain-derived neurotrophic factor show a pathway-specific impairment of long-term potentiation but normal critical period for monocular deprivation.
From theCambridge English Corpus
However, there are several limitations to usingknock-out mice to study gene function.
From theCambridge English Corpus
This is a strong argument, though it is not aknock-down proof for several reasons.
From theCambridge English Corpus
And young audiences found the slapstick andknock-about violence appealing.
From theCambridge English Corpus
He actually went down to see them and knocked on doors.
From theCambridge English Corpus
The most commonly produced transitive verbs wereknockand do (mostly present progressives and past tense uses).
From theCambridge English Corpus
In another incident, a policeman who tried to stop a confrontation between warring factions was knocked unconscious when both groups turned on him.
From theCambridge English Corpus
The ' second hits ' occurs during embryogenesis and knocks out the remaining normal copy allele.
From theCambridge English Corpus
The development ofknock-outs in the rat, however, will require that animals be produced from other more abundant cells or from cultured cells.
From theCambridge English Corpus
The other thing he said to me was that you don'tknocksomething when it is working.
From theCambridge English Corpus
Ifknock-out criteria are being used, which criteria and why they were chosen should be clearly stated.
From theCambridge English Corpus
Such gossip, if leaked, will certainly jeopardize the social status of the family withknock-on effects on all marriageable youths in their kin group.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/knock##
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更新时间：2025/2/10 20:25:54