sheathe
verb [ T ] uk/ʃiːð/ us/ʃiːð/
把（刀剑）插入鞘中
to put a knife back inside its sheath
literary（厚厚地或保护性地）包，覆盖
to cover something in a thick or protective layer of a substance
The landscape was sheathed in ice. 大地为冰雪所覆盖。
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