Acquire, v. t. [imp. & p. p. Acquired; p. pr. & vb. n. Acquiring.] — Webster enters it under “acquire”
Etymology: [L. acquirere, acquisitum; ad + quarere to seek for. In OE. was a verb aqueren, fr. the same, through OF. aquerre. See Quest..]
To gain, usually by one's own exertions; to get as one's own; as, to acquire a title, riches, knowledge, skill, good or bad habits. No virtue is acquired in an instant, but step by step. Barrow. Descent is the title whereby a man, on the death of his ancestor, acquires his estate, by right of representation, as his heir at law. Blackstone.
Syn. -- To obtain; gain; attain; procure; win; earn; secure. See Obtain.
Shades of meaning
Fernald lists acquired only as an antonym, under native.
He lists it without comment; the entries above explain its neighbors.