intone

(verb) utter monotonously and repetitively and rhythmically. Synonyms: tone, chant. Example: "The students chanted the same slogan over and over again."

(verb) recite with musical intonation; recite as a chant or a psalm. Synonyms: chant, intonate, cantillate. Example: "The rabbi chanted a prayer."

(verb) speak carefully, as with rising and falling pitch or in a particular tone. Synonyms: intonate. Example: "Please intonate with sadness."