perorate

to talk as if giving an important and formal speech an arrogant scholar who never passes up an opportunity to posture and perorate on stunningly unimportant matters Synonyms declaim, discourse, harangue, mouth (off), orateRelated Words rant, rave; bloviate, blow; lecture, preach, sermonize; advertise, announce, broadcast, declare, proclaim, pronounce; speak, speechify, talk