Being acquainted with someone or something means having knowledge of them, either through experience or through being told about them. The crossword solutions for the term 'ACQUAINTED WITH' are FAMILIAR (8 letters), KNEW (4 letters), KNOW (4 letters), KNOWN (5 letters), KNOWS (5 letters), and ONSPEAKINGTERMS (15 letters). These words all refer to having knowledge of someone or something, either through direct experience or through being told about them.