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."