declamation (n.)

late 14c., declamacioun, "composition written to be declaimed," from Latin declamationem (nominative declamatio) "exercise in oratorical delivery; declamation;" in a bad sense, "loud, eager talking," noun of action from past-participle stem of declamare "to practice public speaking, to bluster," from de-, here probably an intensive prefix (see de-) + clamare "to cry, shout" (from PIE root *kele- (2) "to shout"). Meaning "a public harangue or speech" is from 1520s; sense of "act of making rhetorical harangues in public" is from 1550s.