好词典
knife
UK /naɪf/US /naɪf/
词源
源自古英语 cnif，来自古诺尔斯语 knifr，可能与古高地德语 kneph（刀）同源。
noun
❶ 一种带有锋利刀刃的工具或武器，通常用于切割、削皮或作为餐具使用。
“He used a sharp knife to cut the bread.”
（他用一把锋利的刀切面包。）
“She accidentally cut her finger with the kitchen knife.”
（她不小心用厨房刀割伤了手指。）
❶ 在比喻意义上，指某种尖锐或伤害性的事物，如言语或行为。
“Her words cut like a knife, leaving him heartbroken.”
（她的话像刀一样锋利，让他心碎。）
“The criticism was a knife in his back.”
（那些批评就像背后捅刀子。）
同义词:blade, cutter, dagger
verb
❶ 用刀切割或刺穿某物，通常指快速而有力的动作。
“He knifed through the crowd to reach the exit.”
（他快速穿过人群到达出口。）
“The burglar knifed open the locked drawer.”
（窃贼用刀撬开了上锁的抽屉。）
同义词:cut, stab, slash
常见短语
under the knife — 指接受外科手术，通常用于非正式场合。
“He's going under the knife tomorrow for his knee surgery.”
（他明天要接受膝盖手术。）
knife-edge — 形容极其紧张或危险的处境，就像站在刀锋上一样。
“The election results were on a knife-edge until the final count.”
（选举结果直到最后计票都处于紧张状态。）