Intone (verb)

1. To speak or sing with a rising and falling pitch.
2. To recite or say something in a monotonous or singsong manner.

Origin:

From the latin word intonare (to intone).

Examples:

1. He intoned the prayers in a deep, resonant voice.
2. The choir intoned a hymn at the beginning of the service.
3. She intoned the words of the poem with a monotonous voice.
4. The teacher intoned the instructions for the students to follow.
5. He intoned the spell in a low, hypnotic voice.