Learn how to say Declaim correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word declaim:
utter or deliver words in a rhetorical or impassioned way, as if to an audience:
she declaimed her views
a preacher declaiming from the pulpit
an opportunity to declaim against the evils of society
late Middle English: from French déclamer or Latin declamare, from de- (expressing thoroughness) + clamare ‘to shout’