affirm

1 to state as a fact usually forcefully unwilling to affirm without further study that the painting is an original Rembrandt Synonyms claim, allege, assert, aver, avouch, avow, contend, declare, insist, maintain, profess, protest, purport, warrantRelated Words announce, broadcast, proclaim; argue, rationalize, reason; confirm, justify, vindicate; defend, persevere, support, uphold; reaffirm, reassertNear Antonyms abandon; disavow, disclaim, disown, negate, negative, reject, repudiate; challenge, dispute, question; confute, disprove, rebut, refute; contradict, counterAntonyms deny, gainsay

2 to state clearly and strongly our business partner affirmed his trust in us, and we in turn promised not to let him down Synonyms assert, aver, avouch, avow, declare, guarantee, lay down, professRelated Words advance, advertise, boost, plug, promote, publicize; announce, blaze, call, proclaim, pronounce, say; accent, accentuate, emphasize, stress, underline, underscore; advocate, champion, defend, espouse, support, uphold; assure, convince, persuade; explain, justify, rationalize; reaffirm, reassertNear Antonyms minimize, understate; disregard, ignore, neglect, overlook