Main Entry: en·vel·op

Pronunciation: \in-ˈve-ləp, en-\

Function: transitive verb

Etymology: Middle English envolupen, from Anglo-French envoluper, envoleper, from en- + voluper to wrap

Date: 14th century

1 : to enclose or enfold completely with or as if with a covering
2 : to mount an attack on (an enemy's flank)

— en·vel·op·ment \-mənt\ noun