declaim

1 to give a formal often extended talk on a subject over the last two centuries some of the most illustrious personages of their times have declaimed in the town's historic lyceum Synonyms talk, descant, discourse, expatiate, harangue, lecture, orate, speakRelated Words recite, soliloquize; dissert, expound, pontificate, sermonize; mouth, spout; filibuster

2 to talk as if giving an important and formal speech he declaimed at some length about the nation's obligation to spread democratic values around the world Synonyms orate, discourse, harangue, mouth (off), perorateRelated Words rant, rave; bloviate, blow; lecture, preach, sermonize; advertise, announce, broadcast, declare, proclaim, pronounce; speak, speechify, talk