intone (verb) – to vocalize or utter in a particular tone or modulation; to recite, chant, or sing (also intonate)
BREAKDOWN: IN- (in) + TON- (tone)
— intonation is the rise and fall of a voice during speech; a recitation or chant
This word is built on the root TON-, which means tension, tone, sound, or thunder.
Common TON- words include astonish, detonate, monotonous, thunder, tone, and tune.