To cover with a cloak or to hide something as if with a cloak; to conceal or disguise.
From be- prefix plus cloak. Cloak comes from Old French cloque, possibly from Medieval Latin clocca meaning 'bell' (because cloaks had a bell-like shape). The prefix be- creates the verb meaning 'to cover with a cloak' or 'to conceal.'
The cloak as a garment was incredibly practical in medieval times—it served as coat, blanket, and even a way to hide weapons or stolen goods, which is why 'cloak' became synonymous with hiding and secrecy. The phrase 'cloak and dagger' still refers to spying and espionage because of this connection!
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