Inflected forms: ac·quaint·ed, ac·quaint·ing, ac·quaints 1a. To cause to come to know personally: Let me acquaint you with my family.b. To make familiar: acquainted myself with the controls.2. To inform: Please acquaint us with your plans.
ETYMOLOGY:
Middle English aqueinten, from Old French acointier, from Medieval Latin accognitre, from Latin accognitus, past participle of accognscere, to know perfectly : ad-, intensive pref.; see ad + cognscere, to know; see cognition.