Definition of acquaint:
(v) :
to furnish or give experimental knowledge of; to make (one) to know; to make familiar; -- followed by with; to communicate notice to; to inform; to make cognizant; -- followed by with (formerly, also, by of), or by that, introducing the intelligence; as, to acquaint a friend with the particulars of an act
"before a man can speak on any subject, it is necessary to be acquainted with it. -
John Locke"