Etymology
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acquaint (v.)

early 13c., "make oneself known" (reflexive, now obsolete); early 14c., "to gain for oneself personal knowledge of," from Old French acointer "make known; make or seek acquaintance of," from Vulgar Latin *accognitare "to make known," from Latin accognitus "acquainted with," past participle of accognoscere "know well," from ad "to" (see ad-) + cognitus, past participle of cognoscere "come to know" (see cognizance).

Meaning "to inform (someone of something), furnish with knowledge or information" is from 1550s. Related: Acquainted; acquainting.

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Definitions of acquaint

acquaint (v.)
cause to come to know personally;
permit me to acquaint you with my son
Synonyms: introduce / present
acquaint (v.)
make familiar or conversant with;
you should acquaint yourself with your new computer
acquaint (v.)
inform;
Please acquaint your colleagues of your plans to move
From wordnet.princeton.edu