knock

n. 敲, 敲打, 敲门
vt. 敲击, 互撞, 攻击
vi. 敲击, 互撞, 攻击
【医】 叩音
相关词组:
get the knock
knock about
knock sb about
knock sth back
knock sth down
knock sb down for
knock it off
knock into sb
knock sth off
knock on
knock sb off
knock sb off his feet
knock out
knock oneself out
knock sb up
knock sb out
knock sth up
knock sth over
knock over
knock together
knock up against
take the knock
knock sb flat

动词过去式:knocked 过去分词:knocked 现在分词:knocking 第三人称单数:knocks 

knock

v.（动词）
knocked,knock.ing,knocks
v.tr.（及物动词）
To strike with a hard blow.
猛烈击打
To affect in a specified way by striking hard:
击打：通过重击产生某种特定的效果：
例句：
knocked the attacker senseless.
把袭击者打昏

To cause to collide:
使碰撞：
例句：
I knocked my head on a low beam.
我的头撞到了一根低梁上

To produce by hitting or striking:
敲出：通过击或打产生：
例句：
knocked a hole in the wall.
在墙上敲出一个洞

To instill with or as if with blows:
灌输：通过击打往里面注入，或用类似击打的方式注入：
例句：
We tried to knock some sense into his head.
我们试着给他灌输一点常识

Slang To find fault with; criticize:
【俚语】 找错；批评：
例句：
Don`t knock the food; it`s free.
别挑剔食物了；它是免费的

v.intr.（不及物动词）
To strike a sharp, audible blow or series of blows, as on a door.
猛烈敲击：急速而又能被人听见的一次或多次敲击，如敲门
To collide with something:
与某物相撞：
例句：
knocked into the table.
撞到了桌子

To make a pounding or clanking noise:
发出爆震或相撞的声音：
例句：
The car engine is knocking.
汽车发动机发出爆震声

n.（名词）
An instance of striking or colliding; a blow.
敲击，碰撞：击打或相撞的事例；敲击
The sound of a sharp tap on a hard surface; a rap.
敲击声：在坚硬的表面上的急促敲击的声音；敲击声
A pounding or clanking noise made by an engine, often as a result of faulty fuel combustion.Also called ping
爆震声：发动机发出的震动或撞击的声音，通常是由于燃料燃烧不足引起也作 ping
Slang A cutting, often petty criticism.
【俚语】 尖刻而琐碎的批评

<常用词组>knock around 或
knock about
To be rough or brutal with; maltreat.
虐待：粗暴或残忍地对待；虐待
To wander from place to place:
游历：从一个地方漫游到另一个地方：
例句：
knocking around Europe.
在欧洲游历

Informal To discuss or consider:
【非正式用语】 讨论，思考：
例句：
met to knock around some ideas.
聚在一起讨论一些问题

knock back 【非正式用语】
To gulp (an alcoholic drink).
喝下（酒精饮料）
knock down
To bring to the ground with a blow; topple.
击倒在地：用一击打倒在地；使倒下
To disassemble into parts, as for storage or shipping.
拆卸：为了储藏或运输而拆卸成几部份
To declare sold at an auction, as by striking a blow with a gavel.
敲槌宣布卖出：在拍卖会上宣布货物卖出，比如用木槌敲击来宣布
Informal To reduce, as in price:
【非正式用语】 削减价格等：
例句：
knocked all the radios down 20 percent.
把所有的收音机都降价百分之二十

Slang To receive as wages; earn:
【俚语】 收到（工资）；赚：
例句：
knocks down $50 an hour.
每小时收入50美元

knock off
Informal
【非正式用语】
To take a break or rest from; stop:
暂停或休息；停止：
例句：
knocked off work at noon.
中午暂停工作

To cease work:
停止工作：
例句：
It`s after five; let`s knock off.
已经五点多了；下班吧

Informal To complete, accomplish, or dispose of hastily or easily; finish:
【非正式用语】 仓促写出，即席作成：仓促或轻易地完成、做完或处理；结束：
例句：
That author knocks off a book a year.
那位作者在一年内仓促完成了这本书

Informal To get rid of; eliminate:
【非正式用语】 除掉；消除：
例句：
knocked off 2 pounds in a month.
一个月内体重减了2磅

Slang To kill or overcome.
【俚语】 杀，战胜
Slang To hold up or rob:
【俚语】 持枪抢劫，拦路抢劫：
例句：
knocked off a bank.
抢劫银行

Informal To copy or imitate, especially without permission:
【非正式用语】 翻印：复印或模仿，尤指在未经允许的情况下：
例句：
knocking off someone else`s ideas.
抄袭别人的构想

knock out
To render unconscious.
使昏迷不醒
Sports To defeat (a boxing opponent) by a knockout.
【体育运动】 击倒对手：通过击到对方而击败（拳击比赛中的对手）
To render useless or inoperative:
使无用，使失去效能：
例句：
The storm knocked out the telephones.
风暴使电话中断

Informal To exert or exhaust (oneself or another) to the utmost:
【非正式用语】 尽心尽力：最大程度地努力或用尽（自己或别人的）力量：
例句：
knocked herself out to be ready on time.
为了及时作好准备她竭尽全力

knock together
To make or assemble quickly or carelessly.
仓促完成：很快或粗粗地制作或拼凑
knock up
Slang To make pregnant.
【俚语】 使怀孕
Chiefly British To wake up or summon, as by knocking at the door.
【多用于英国】 敲门叫醒或召唤
Chiefly British To wear out; exhaust.
【多用于英国】 用尽力气；精疲力竭
<习惯用语>have it knocked【俚语】
To be certain of success:
确信能成功：
例句：
.He knew he had it knocked after he saw a rough cut ofChinatown . (Time)
.他在看了唐人街 的粗制烟叶后，他知道自己已经成功了. (时代)

knock cold
To render unconscious; knock out.
使昏迷；击昏
knock dead
To kill with a blow.
一拳打死
Slang To affect strongly and positively:
【俚语】 强烈而肯定地影响：
例句：
an amazing performance that knocked the audience dead.
一场使观众为之倾倒的精彩演出

knock for a loop【俚语】
To surprise tremendously; astonish.
使非常吃惊；使震惊
knock it off【俚语】
Quit it. Used in the imperative:
别吵了。用于祈使句：
例句：
Knock it off! I`m trying to sleep.
别闹了！我要睡觉了

knock out of the box【棒球】
To force the removal of (an opposing pitcher) by heavy hitting.
打掉投手：由于一再击中球而使（对方投球手）出局
knock the socks off 或
knock someone`s socks off 【俚语】
To overwhelm or amaze.
使不知所措，使吃惊
来源：
Middle English knokken
中古英语 knokken
from Old English cnocian
源自 古英语 cnocian