To hide something or keep it secret so that it cannot be seen or discovered.
From Old French conceler, derived from Latin concelare (con- meaning 'together' and celare meaning 'to hide'). The root celare is related to cellar, a hidden underground space.
Interestingly, camouflage and concealment work differently in nature than humans expect—animals often use bold patterns to hide, not blend in perfectly. A spotted leopard disappears in dappled sunlight better than solid colors would, using 'breaking camouflage' rather than true blending.
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