combust

(kəm-bŭstˈ)

1. a. To catch fire; burst into flame: The fire started when a pile of oily rags spontaneously combusted.
   b. To undergo combustion; burn: As the fuels were combusting they gave off noxious vapors.
2. To become suddenly angry or agitated: The defendant combusted when he heard the verdict.

1. To cause to burn; ignite.
2. To cause to become angry or violent: riots that are combusting whole provinces.