scabbard

n. (刀、剑)鞘,枪套

He made a very beautiful scabbard for his knife.

他为他的刀做了一个漂亮的鞘。

The scabbard is content to be dull when it protects the keenness of the sword.

刀鞘保护刀的锋利，它自己则满足于它的迟钝。