单词详解 

1. n.

刀 (edged tool used as a cutting instrument )

Your knife is so dull that it will not cut. 你的这把刀子太钝了，割不开东西。

2. vt.

切割，刺 (use a knife on)

Somebody knifed him on the back. 有人在背后砍了他一刀。

相关词组

1. knife and fork 刀叉

I am not used to using a knife and fork. 我不习惯使用刀和叉。

2. under the knife 在外科手术中

His father died under the knife. 他父亲于手术中死亡。

相关单词

过去式：knifed

过去分词：knifed

现在分词：knifing

名词复数：knives