How do you spell Intonate

Available Definitions:
1)  v. i. - To thunder.
2)  v. i. - To sound the tones of the musical scale; to practice the sol-fa.
3)  v. i. - To modulate the voice in a musical, sonorous, and measured manner, as in reading the liturgy; to intone.
4)  v. t. - To utter in a musical or sonorous manner; to chant; as, to intonate the liturgy.