sheathe [ʃi:ð]

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vt.（将刀剑）插入鞘；包，覆盖

to put a knife back inside its sheath

Sheathe your swords! 把你们的剑插到鞘里！
The two opponents decided at last to sheathe the sword and met at a dinner given. 这两个对手终于决定讲和，在朋友举行的晚宴上会面了。