envelop
/ɪnˈveləp; ɪn`vɛləp/ v[Tn, Tn.pr]
~ sth/sb (in sth) wrap sth/sb up; cover or surround sth/sb completely (in sth) 包住某事物[某人]; 将某事物[某人]覆盖, 包围（於某事物中）
mountains enveloped in cloud 隐没在云中的群山
a baby enveloped in a blanket 裹在毛毯中的婴儿
The coat was far too big it completely enveloped him. 大衣太大--把他整个儿包起来了.
(fig 比喻) envelop a subject in mystery 把某一问题弄得神秘莫测.