(pl. knives /naɪvz/)
1- a cutting instrument composed of a blade and a handle into which it is fixed, either rigidly or with a joint刀, 小刀。
1.1
- an instrument such as this used as a weapon匕首; 刺刀。
1.2
- a cutting blade forming part of a machine（机器上的）刀片; （切削）刀具。
with obj.
1- stab (someone) with a knife用刀刺（人）。
1.1
- no obj., with adverbial cut like a knife（像刀一样）切割：
a shard of steel knifed through the mainsail.
一块钢片割开了大桅帆。
短语
before you can say knife
- informal very quickly; almost instantaneously〈非正式〉极快地, 一瞬间。
(that) one could cut with a knife
- (of an accent or atmosphere) very obvious（口音, 气氛）浓重的, 非常明显的。
get （或stick） the knife into（或in） someone
- informal do something hostile or aggressive to someone〈非正式〉做敌视某人的事; 威胁某人。
go （或be） under the knife
- informal have surgery〈非正式〉经受外科手术。
the knives are out for someone
- informal there is open hostility (towards someone)〈非正式〉（对某人）剑拔弩张。
like a hot knife through butter
- very easily; without any resistance or difficulty轻而易举; 势如破竹：
anti-aircraft fire would slice through the car like a hot knife through butter.
防空火力将轻而易举地把汽车打成碎片。
twist （或turn） the knife in the wound
- deliberately make someone's sufferings worse故意让人更加痛苦, 给伤口上抹盐。
派生词
knife-like
adjectiveknifer
noun词源
late Old English cnīf, from Old Norse knífr, of Germanic origin.