Meaning

noun anything that covers or conceals

noun a loose outer garment

verb hide under a false appearance

originFrom Middle English cloke, from Old Northern French cloque (“travelling cloak”), from Medieval Latin clocca (“travelers' cape, literally “a bell”, so called from the garment’s bell-like shape”), of Celtic origin, from Proto-Celtic *klokkos, ultimately imitative. Doublet of cloche and clock.

Etymology from Wiktionary, CC BY-SA 3.0