acquaintedпричастие прошедшего времени Used exclusively as a past-participle adjective; specifying the sub-category improves grammatical accuracy.
She is acquainted with the new software.
Она знакома с новым программным обеспечением.
acquaintпричастие прошедшего времени Past-participle form “acquainted” functions as an adjective meaning ‘familiar’; should be represented.