knife
noun
verb
naɪf noun
1 a metal blade fixed into a handle, used for cutting or as a weapon 刀;
a knife and fork
一副刀叉
Some young people are carrying knives to defend themselves.
一些年轻人带刀子自卫。
a kitchen knife
厨房用刀
Use a sharp knife to cut the melon into sections.
用快刀把瓜切成块。
2
the knives are out (for sb)
used to say that people are being extremely unfriendly in criticizing someone [非正式] （对某人）剑拔弩张 （兴师问罪 ） informal
The knives are out for the vice president.
要对副总统兴师问罪了。
3
twist/turn the knife (in the wound)
to say something that makes someone more upset about a subject they are already unhappy about 火上浇油，落井下石
4
stick/put etc the knife in/into someone
to dislike someone and be very unfriendly towards them [英，非正式] 对某人怀恨在心，对某人极不友好 BrE informal
5
under the knife
having a medical operation [非正式] 接受手术 informal
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 〔感觉到屋内的人相互间〕气氛很不友好 （使人透不过气来 ）
7
like a (hot) knife through butter
used to say that something happens or is done very easily, without any problems [非正式] 轻而易举地 informal
verb
8 to put a knife into someone’s body 用刀刺〔某人〕;
She had been knifed to death .
她被人用刀扎死了。