knife 1 S3 W3 / naɪf / 名词 ( 复数形式 knives / naɪvz / ) [可数名词]

1 a metal blade fixed into a handle, used for cutting or as a weapon → scalpel :

a knife and fork

Some young people are carrying knives to defend themselves.

a kitchen knife

Use a sharp knife to cut the melon into sections. → carving knife , flick knife , palette knife , paper knife , penknife

2 the knives are out (for somebody) informal used to say that people are being extremely unfriendly in criticizing someone :

The knives are out for the vice president.

3 twist/turn the knife (in the wound) to say something that makes someone more upset about a subject they are already unhappy about

4 stick/put etc the knife in/into someone British English informal to dislike someone and be very unfriendly towards them

5 under the knife informal having a medical operation

6 you could cut the atmosphere/air/tension with a knife used to say that you felt the people in a room were angry with each other

7 like a (hot) knife through butter informal used to say that something happens or is done very easily, without any problems

COLLOCATIONS

ADJECTIVES/NOUN + knife

sharp Be careful using that knife - it’s very sharp.

blunt (= not sharp ) The knife was so blunt it wouldn’t cut anything.

a bread knife Will you pass me the bread knife?

a kitchen knife (= a long knife used for cutting vegetables etc ) Every chef has his own set of kitchen knives.

a carving knife (= for cutting meat ) Dad always used to sharpen the carving knife.

a pocket knife (= a small knife that you carry with you ) He was armed with nothing but a pocket knife.

knife + NOUN

a knife wound She died from a single knife wound.

a knife attack He was sentenced to 9 years in prison for a knife attack.

knife crime (= crimes in which people are attacked with knives ) Knife crime is on the increase.

短语

the blade of a knife The blade of the knife cut cleanly through the rope.

the handle of a knife His hand reached down to the handle of his knife.

动词

carry a knife (= have it with you ) The campaign warns young people about the dangers of carrying knives.

be armed with a knife (= have it with you ) One of the men was armed with a knife.

hold a knife In his hand, he held a long knife.

threaten somebody with a knife The girls were threatened with a knife.

brandish/wield a knife (= wave it around in a threatening way ) A man brandishing a knife burst into the room.

sharpen a knife (= make it sharper ) What’s the best way to sharpen a knife?