combust

Undergo combustion.

Start to burn or burst into flames.

“The oily rags combusted spontaneously”

Cause to burn or combust.

“We combust coal and other fossil fuels”

Get very angry and fly into a rage.

“The professor combusted when the student didn't know the answer to a very elementary question”

Cause to become violent or angry.

“Riots combusted Pakistan after the U.S. air attacks on Afghanistan”