combustible

Etymology

From Middle French combustible.

adj

1. Capable of burning.
   Dumping fertilizer on top of whatever mysterious goop was in the storage tank created a combustible mix which caught fire.
   The rest were undergoing special underbody cleaning safety checks at TfW depots, after speculation that the cause of the incidents may have been a build-up of engine oil and combustible material such as fallen leaves and general detritus. March 22 2023, “Network News: Class 175s withdrawn for safety checks after fires”, in RAIL, number 979, page 13
2. (figurative, dated) Easily kindled or excited; quick; fiery; irascible.
   The world’s richest man has inserted himself in some of the world’s most combustible conflicts. 2022-10-26, Cade Metz, Adam Satariano, Chang Che, “How Elon Musk Became a Geopolitical Chaos Agent”, in The New York Times, →ISSN

noun

1. A material that is capable of burning.