Meaning

verb enclose or enfold completely with or as if with a covering

originFrom Middle English envolupen, from Old French anveloper, envoluper (modern French envelopper), from en- + voloper, vloper (“to wrap, wrap up”) (compare Italian -viluppare; Old Italian alternative form goluppare (“to wrap”)) from Vulgar Latin *vuloppare (“to wrap”), from Proto-Germanic *wlappaną, *wrappaną (“to wrap, roll up, turn, wind”), from Proto-Indo-European *werb- (“to turn, bend”)…

Etymology from Wiktionary, CC BY-SA 3.0