"More intonated" refers to a higher level of vocal inflection, but its antonyms signify the opposite. The antonyms of "more intonated" may include monotonous, flat, expressionless, unvarying, or undramatic, signifying a lack of variation or modulation in tone. Someone speaking flatly and monotonously may come across as dull and uninteresting, lacking the passion and energy that intonation can convey. It's important to use intonation effectively in communication, whether in public speaking, singing or day-to-day conversations, to convey emotions and emphasis, and to keep the listener's attention. In contrast, using fewer intonations may make someone sound monotone and robotic, lacking personality and character.