The Oxford Thesaurus An A-Z Dictionary of Synonyms - envelop v.

1) wrap, enclose, enfold, enwrap, cover, engulf, swathe, shroud, enshroud, swaddle: The body was enveloped in a white robe. 2) shroud, enshroud, cover, conceal, hide, screen, shield, obscure, veil, cloak: The motive for the murder was enveloped in a mass of misleading clues.