envelop

动词 envelop:

1. enclose or enfold completely with or as if with a covering
   同义词：enfold, enwrap, wrap, enclose

1. The building was soon enveloped in flames.
   那幢建筑物很快就陷入了火海之中。
2. The papers are falling out of the envelop, push them back.
   论文从封袋里掉出来了，把它们放回原处。

en.vel.op

v.tr.（及物动词）
en.vel.oped,en.vel.op.ing,en.vel.ops
To enclose or encase completely with or as if with a covering:
包住：用或好象用遮盖物完全包住或围住：
例句：
.Accompanying the darkness, a stillness envelops the city.(Curtis Wilkie)
.随着黑暗的降临，静寂笼罩了城市.(柯蒂斯·威尔基)

To attack (an enemy`s flank).
攻击（敌军侧翼）

来源：
Middle English envolupen [to be involved in]
中古英语 envolupen [被卷入]
from Old French envoluper, envoloper
源自 古法语 envoluper, envoloper
en- [in] * see en-
en- [在…里面] *参见 en-
voloper [to wrap up]
voloper [包裹起来]

【引伸】
envel.oper
n.（名词）
envel.opment
n.（名词）