knife

名词 knife:

1. edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle
2. a weapon with a handle and blade with a sharp point
3. any long thin projection that is transient
   同义词：tongue

动词 knife:

1. use a knife on
   同义词：stab

1. He whetted his knife on the stone.
   他在石头上磨刀。
2. He cleaved an apple with a knife.
   他用一把刀子将苹果切开。
3. I couldn't withstand a murderous-looking knife.
   我无法忍受凶光闪闪的刀。
4. His strong voice cut through the hum of conversation like a knife through butter.
   他那宏亮有力的声音一下子压倒了嗡嗡的谈话声。
5. I picked up the knife and threw it out of the window.
   我拿起了那把刀，把它扔到了窗外。

knife

n.（名词）
【复数】 knives[novz]
A cutting instrument consisting of a sharp blade attached to a handle.
有柄的小刀：由一个附在柄上的锋利刀片构成的切割工具
A cutting edge; a blade.
刀刃；刀锋
v.（动词）
knifed,knif.ing,knifes
v.tr.（及物动词）
To use a knife on, especially to stab; wound with a knife.
用刀切割，用刀割伤：用刀，尤指刺伤；用刀弄伤
Informal To betray or attempt to defeat by underhand means.
【非正式用语】 背叛，陷害：用不光彩的手段出卖或试图战胜
v.intr.（不及物动词）
To cut or slash a way through something with or as if with a knife:
切割，划过：用刀或好象用刀割或割开一道：
例句：
The boat knifed through the waves.
船只破浪前进

<习惯用语>under the knife【非正式用语】
Undergoing surgery.
进行外科手术
来源：
Middle English knif
中古英语 knif
from Old English cnof
源自 古英语 cnof
from Old Norse knofr
源自 古斯堪的纳维亚语 knofr

【引伸】
knif.er
n.（名词）