CLOAK

I. noun Etymology: Middle English cloke, from Anglo-French cloque bell, ~, from Medieval Latin clocca bell; from its shape Date: 13th century a loose outer garment, something likened to an outer garment: as, something that envelops or conceals , a distinctive character or role , II. transitive verb Date: 1509 to cover or hide with or as if with a ~, see: disguise