Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

mid-15c., "the adjustment of a dispute, a negotiated agreement," from Middle French transaction, from Latin transactionem (nominative transactio) "an agreement, accomplishment," from past participle stem of transigere "accomplish, drive or carry through," from trans- "through" + agere "to drive" (see act). Meaning "a piece of business" is attested from 1640s.