Looking up...
to keep something secret or out of sight
The spy was trained to conceal his identity.
The spy learned how to keep his true identity hidden.
Usually a transitive verb; often followed by the object being hidden.
Use *conceal* in written or formal speech; in casual conversation, *hide* is more natural.
*Conceal* is normally transitive – you conceal something, not *conceal* by itself.
From Middle English *conceilen*, from Old French *conceillir*, from Latin *concelare* (prefix *con-* ‘together’ + *celare* ‘to hide’).
Often used in formal or literary contexts; common collocations include *conceal the truth*, *conceal a fact*, *conceal oneself*. The verb is typically followed by a direct object.