Definition of "Combust" :

verb: undergo combustion

verb: cause to become violent or angry

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

verb: get very angry and fly into a rage

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

verb: start to burn or burst into flames

"The oily rags combusted spontaneously."

verb: cause to burn or combust

"We combust coal and other fossil fuels."