envelop

envelop
[ɪnˈvɛləp, ɛn-]
(enveloped, enveloping)
  1. [with obj.]wrap up, cover, or surround completely
    包，包装；裹；封
    a figure enveloped in a black cloak.
    裹着一件黑袍的人。
    a feeling of despair enveloped him.
    一种绝望的情绪笼罩着他。
    ■(of troops) surround (an enemy force)
    （军队）包围（敌军）
派生
envelopment
noun
语源
  1. late Middle English (formerly also as invelop(e): from Old French envoluper, from en- 'in' + a second element (also found in develop) of unknown origin
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