Recognize
late Middle English (earliest attested as a term in Scots law): from Old French reconniss-, stem of reconnaistre, from Latin recognoscere ‘know again, recall to mind’, from re- ‘again’ + cognoscere ‘learn’.
wiktionary
Borrowed from Old French reconoistre, from Latin recognoscere, first attested in the 16th century. Displaced native English acknow(“to recognize, perceive as”), compare German erkennen and Swedish erkänna.
From re- + cognize.
etymonline
recognize (v.)
early 15c., recognisen, "resume possession of land," a back-formation from recognizance, or else from Old French reconoiss-, present-participle stem of reconoistre "to know again, identify, recognize," from Latin recognoscere "acknowledge, recall to mind, know again; examine; certify," from re- "again" (see re-) + cognoscere "to get to know, recognize" (see cognizance).
With ending assimilated to verbs in -ise, -ize. The meaning "know (the object) again, recall or recover the knowledge of, perceive an identity with something formerly known or felt" is recorded from 1530s. Related: Recognized; recognizing.
