adjective

orotund

OR-uh-tund/ˈɔːrətʌnd/

Rich, rounded, and resonant in sound.

The narrator's orotund voice fills the room without a microphone.

An actor delivering a grand, sonorous declamation: rounded articulation, open-chested composure, and a broad, measured gesture make an imposing vocal style recognizable without depicting shouting.

Etymology

The image is speaking “with round mouth,” a Latin expression for speaking in well-rounded phrases. This connects rounded expression with the fullness and richness of an imposing voice or style.

More examples

She sings the final verse in an orotund contralto.
The cello adds an orotund tone to the ensemble.
His speaking voice is quiet but surprisingly orotund.

Forms

orotund

orotundity noun — The quality of a full, resonant sound.

Similar words

resonant: Emphasizes depth and sustained vibration rather than rounded fullness.
sonorous: Emphasizes an impressively deep, full sound, often in voices.
rotund: Can likewise describe full, rounded sound, but usually describes shape.