To lick all over or to cover with licking.
From be- (intensive prefix) + lick (Old English leccan, from Proto-Germanic). The be- prefix intensifies the action of licking to mean complete or thorough coverage.
Dogs invented this behavior long before we had a word for it—they belick your face completely! The 'be-' prefix in Old English was like adding an exclamation point to an action, turning a simple lick into total enthusiastic coverage.
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