Origin: before 1150; (v.) Middle English purchasen < Anglo-French purchacer to seek to obtain, procure (Old French pourchacier), equivalent to pur- (< Latin prōpro1) + chacer to chase1; (noun) Middle English < Anglo-French purchas (Old French porchas), derivative of the v.
Related forms
pur·chas·er, noun
mis·pur·chase, verb (used with object), -chased, -chas·ing.
non·pur·chase, noun
non·pur·chas·er, noun
o·ver·pur·chase, verb (used with object), -chased, -chas·ing.
late 13c., "obtain, contrive, bring about," from Anglo-Fr. purchaser "go after," from pur- "forth" (possibly used here as an intensive prefix; see purblind) + O.Fr. chacier "run after" (see chase). Sense of "buy" first recorded late 14c., though
the word continued to be used for "to get by conquest in war, obtain as booty" up to 17c. Noun meaning "that which is bought" is recorded from 1580s. The sense of "hold or position for advantageously applying power" (1711) is extended from the nautical verb meaning "to haul or draw (especially by mechanical power)," used especially of hauling up anchors, and attested from 1560s.