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IELTS BNC: 2471 COCA: 2240
knife
naɪf naɪf
Word forms: plural knives, 3rd person singular present tense knifes, present participle knifing, past tense , past participle knifed
knives is the plural form of the noun and knifes is the third person singular of the present tense of the verb. knives 是该词的名词复数形式，knifes 是该词的动词现在时第三人称单数形式。
1 N-COUNT 刀 A knife is a tool for cutting or a weapon and consists of a flat piece of metal with a sharp edge on the end of a handle. 刀

  • ...a knife and fork.

    一副刀叉

  • Two robbers broke into her home, held a knife to her throat and stole her savings.

    两个盗贼闯进了她的家，把刀架在她的脖子上，抢走了她的积蓄。

SYN blade, carver, cutter, cutting tool
2 VERB 用刀伤害 To knife someone means to attack and injure them with a knife. 用刀伤害 [Also VERB n]

  • Dawson takes revenge on the man by knifing him to death. [VERB noun prep.]

    道森用刀杀死了他的仇人。

  • She was knifed in the back six times. [VERB noun prep.]

    她的背部中了6刀。

SYN cut, wound, stab, slash
3 N-COUNT 手术刀 A surgeon's knife is a piece of equipment used to cut flesh and organs during operations. It is made of metal and has a very thin sharp edge. 手术刀
4 PHRASE 接受手术；动手术 If you go under the knife, you have an operation in a hospital. 接受手术；动手术

  • Kelly was about to go under the knife when her surgeon stopped everything.

    凯莉的手术就要开始时被她的外科医生给叫停了。

5 See also: carving knife  fish knife  flick knife  palette knife  paper knife  pocket knife  Stanley knife 
6 PHRASE 轻而易举；毫无困难 If someone does something like a knife through butter or like a hot knife through butter, they do it very easily. 轻而易举；毫无困难

  • Spending by Japanese companies has left them more competitive than companies in other nations. They will be cutting through the competition like a hot knife through butter.

    日本公司的支出使得它们比其他国家的公司更具竞争力。它们将在竞争中轻而易举地取胜。

7 PHRASE （紧张的气氛）使人透不过气来 If you have been in a place where there was a very tense atmosphere, you can say that you could have cut the atmosphere with a knife. （紧张的气氛）使人透不过气来 [mainly British]

  • Officials hung the flag upside down. You could have cut the atmosphere with a knife.

    官员们把旗子挂倒了。气氛紧张得让人透不过气来。

8 PHRASE 对…磨刀霍霍；对…兴师问罪 If a lot of people want something unpleasant to happen to someone, for example if they want them to lose their job, you can say that the knives are out for that person. 对…磨刀霍霍；对…兴师问罪 [mainly British]

  • The Party knives are out for the leader.

    该党派要向其领导人开刀了。

9 PHRASE 落井下石；往伤口上撒盐 If you twist the knife or if you turn the knife in someone's wound, you do or say something to make an unpleasant situation they are in even more unpleasant. 落井下石；往伤口上撒盐

  • Travis twisted the knife by laughing at her.

    特拉维斯火上浇油般地嘲笑她。

  • It is the turn of Latvia to twist the knife.

    轮到拉特维亚落井下石了。

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IELTS BNC: 2471 COCA: 2240
knife

noun¹

 1tool for cutting切割工具ADJECTIVE | ... OF KNIVES | VERB + KNIFE | KNIFE + VERB | KNIFE + NOUN | PREPOSITION | PHRASES ADJECTIVE➤blunt, dull (especially NAmE) 鈍刀▸➤sharp鋒利的刀➤serrated鋸齒刀▸➤long長刀➤small小刀➤four-inch, six-inch, etc. * 4 英寸長、6 英寸長等的刀➤rusty生銹的刀➤electric電熱刀▸➤➤plastic, silver, steel塑料刀；銀製刀；鋼刀➤kitchen, table菜刀；餐刀➤bread, butter, fish, steak切麪包刀；塗黃油用刀；食魚用刀；牛排餐刀▸➤butcher, butcher's, chef's屠刀；廚師用刀➤carving, paring (especially NAmE) 切（熟）肉刀；削皮刀➤pocket, Swiss army™小摺刀；瑞士軍刀➤bowie, hunting, sheath (especially BrE) 鮑伊獵刀；獵刀；帶鞘的刀➤butterfly, flick (BrE) 蝴蝶刀；彈簧刀➤Stanley™, utility (NAmE) 史丹利刀；多用途刀➤craft, X-acto™ (NAmE) 工藝刀；美工刀➤palette調色刀➤putty (NAmE) 油灰刀... OF KNIVES➤set一套刀具◇a set of kitchen knives一套菜刀VERB + KNIFE➤pick up拿起刀◇She picked up her knife and fork and started to eat.她拿起刀叉吃了起來。➤lay down, put down放下刀▸➤use用刀◇Use a sharp knife to cut away the spare dough.用鋒利的刀切掉多餘的麪團。➤sharpen磨刀▸➤hold握刀KNIFE + VERB➤cut, slice刀切；刀切片◇That knife doesn't cut very well－it needs sharpening.那把刀切東西不太快了，需要磨一磨。➤clatter刀噹啷作響KNIFE + NOUN➤blade, handle刀刃；刀柄➤block, holder刀架；刀座➤sharpener磨刀器具PREPOSITION➤with a/the knife用刀◇The lines can be cut with a craft knife.可以用裁紙刀裁出輪廓。PHRASES➤the blade of a knife, the handle of a knife刀刃；刀把▸➤go under the surgeon's knife (especially BrE) 接受手術◇He is to go under the surgeon's knife (= have surgery) again on Thursday.星期四他要再次手術。➤a knife and fork一副刀叉
knife

noun²

 2used as a weapon武器ADJECTIVE | VERB + KNIFE | KNIFE + VERB | KNIFE + NOUN | PREPOSITION | PHRASES ADJECTIVE➤long, sharp長刀；利刀➤combat (especially NAmE) 戰刀VERB + KNIFE➤be armed with, carry, have持刀；帶刀；有刀◇She carries a knife in her bag now.她現在包裏裝着刀子。➤brandish, point, wave, wield揮動刀；用刀指着；揮舞刀◇She pointed her knife at Richard.她把刀指向理查德。◇He waved his knife in her face threateningly.他在她面前揮刀威脅。➤draw, draw out, produce, pull, pull out, take out, whip out拔刀；拔出刀；亮出刀；抽出刀◇He suddenly pulled a knife on me.他突然掏出刀子衝着我。◇She suddenly produced a knife from her pocket and started brandishing it.她突然從口袋裏掏出一把刀揮舞起來。➤come at sb with, stab sb with, threaten sb with持刀逼近某人；用刀刺某人；持刀威脅某人◇She stabbed him in the back with a 12-inch knife.她用一把 12 英寸長的刀刺進他的後背。➤plunge, press, push, put, stick, thrust, twist (often figurative) 把刀插入；持刀抵住；用刀捅向；用刀戳；傷口上撒鹽◇He plunged the knife deep into her heart.他把刀直插進她的心臟。◇He pressed the knife tighter against her throat.他把抵在她喉部的刀壓得更緊了。◇Just to twist the knife (= cause additional suffering, tension, etc.), the filmmakers have provided a surprise ending.為了更加悲情，電影製作者早已準備好了一個令人吃驚的結局。➤sharpen, whet磨刀KNIFE + VERB➤cut sth, pierce sth, slash sth, slice sth, slice through sth刀切⋯；刀刺穿⋯；刀猛砍⋯；刀把⋯切成片；刀切穿⋯◇She cried out in pain as the knife slashed her arm.刀砍到她胳膊時她痛苦地大叫了起來。◇She felt a knife slice her wrist open.她感覺到一把刀切開了自己的手腕。➤protrude刀伸出◇He was slumped over his desk with a knife protruding from his back.他趴倒在書桌上，背上插着一把刀。KNIFE + NOUN➤attack, fight持刀襲擊／鬥毆◇a frenzied knife attack亂刀襲擊◇He and his gang had a knife fight one night.一天夜裏，他和他的團夥經歷了一場持刀混戰。➤cut, wound刀口；刀傷▸➤blade刀刃PREPOSITION➤with a/the knife用刀PHRASES➤the blade of a knife, the hilt of a knife刀刃；刀柄➤hold a knife against sb's throat, hold a knife at sb's throat, hold a knife to sb's throat, put a knife to sb's throat用刀抵住某人的喉嚨；把刀架在某人脖子上◇She put the knife to his throat to frighten him into silence.她用刀抵住他的喉嚨，威脅他不要出聲。➤a knife in sb's heart (figurative) 讓某人傷心的話◇Each word he uttered was a knife in her heart.他說的每個字都讓她心如刀割。
IELTS BNC: 2471 COCA: 2240
knife

noun

knife ♦︎ blade ♦︎ dagger ♦︎ scalpel ♦︎ machete ♦︎ cleaver ♦︎ switchblade ♦︎ penknifeThese are all words for tools that have a sharp edge or edges for cutting. 这些词均表示用来切割的刀。PATTERNS AND COLLOCATIONS 句型和搭配◆with a knife / blade / dagger / scalpel / machete / cleaver / switchblade / penknife◆a sharp knife / blade / dagger / penknife◆a blunt knife / penknife◆a long / short knife / blade / dagger◆to hold / use / pick up / put down a knife / blade / dagger / scalpel / machete / cleaver / switchblade / penknife◆to cut sth with a knife / blade / scalpel / machete / penknife◆to stab sb / sth with a knife / blade / dagger◆to chop sth with a knife / machete / cleaver◆to slash sb / sth with a knife / blade / machete◆a knife / blade / dagger / scalpel / machete / penknife cuts sth■ knife (plural knives) [countable] a sharp blade with a handle, used for cutting or as a weapon 刀（用作切割工具或武器）◆Sara placed her knife and fork neatly on the plate.萨拉把刀叉整齐地摆放在盘子上。◆a kitchen / carving / hunting knife菜刀；切肉刀；猎刀◆She was murdered in a frenzied knife attack.她被乱刀砍死了。■ blade [countable] the flat part of a knife, tool or machine, which has a sharp edge or edges for cutting 刀身；刀片；刀刃◆Knife blades are generally made of stainless steel.刀刃通常是用不锈钢制成的。◆Razor blades should always be sharp.剃须刀片应该总是很锋利。ⓘ Blade is also used to mean 'knife' or (more frequently) 'sword'. * blade也可指刀，但更多指剑◆The swordsmen weaved and dodged as their blades clashed over and over again.剑客们在剑锋的反复撞击声中腾挪躲闪。 ■ dagger [countable] a short pointed knife that is used as a weapon 匕首；短剑◆Each man was armed with both sword and dagger.每个人都配备了剑和匕首。■ scalpel ˈskælpəl [countable] a small sharp knife used by doctors in medical operations 解剖刀；手术刀◆The surgeon made the first incision with a wide-bladed scalpel.外科医生用宽口手术刀剖开了第一道切口。■ machete məˈʃeti [countable] a broad heavy knife used as a cutting tool or as a weapon 大刀；大砍刀◆She used her machete to clear a way through the jungle.她用大砍刀在丛林中开出一条路。■ cleaver [countable] a heavy knife with a broad blade, often used for cutting large pieces of meat 砍肉刀；剁肉刀◆With a meat cleaver or heavy chef's knife, cut the chicken into large pieces.用剁肉刀或大厨师刀把鸡剁成大块儿。■ switchblade ˈswɪtʃbleɪd [countable] a knife with a blade inside the handle that jumps out quickly when a button is pressed 弹簧刀◆Owning or carrying a switchblade is illegal in the United Kingdom.在英国，持有或携带弹簧刀是违法的。■ penknife ˈpennaɪf [countable] a small knife with one or more blades that fold down into the handle 小折刀◆He pulled the penknife out of his pocket and opened it.他从口袋里掏出小折刀并将它打开。
IELTS BNC: 2471 COCA: 2240
knife
Knives, forks and spoons: carving fork, carving knife, chopper...
Knives used as tools or weapons: clasp knife, flick knife, jackknife...
Medical equipment: catheter, defibrillator, drain...
To kill a person or animal: kill, murder, strangle...
To injure yourself or someone else: injure, harm, wound...

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