To pledge or bind oneself to something; to engage or commit to a course of action.
From Old French 'enager,' combining en- (to put into) with gage (a pledge). The word originally meant to put something up as security for a debt.
This archaic word shows how 'engage' and 'gage' (meaning pledge) are related—when you truly enage yourself, you're putting your reputation and word up as collateral.
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