Arnold was a combustible character.
W. Irving.
Com*bus"ti*ble (?), n. A substance that may be set on fire, or which is liable to take fire and burn.
All such combustibles as are cheap enough for common use go under the name of fuel.
Ure.
Com*bus"ti*ble*ness, n. Combustibility.
Com*bus"tion (?; 106), n. [L. combustio: cf. F. combustion.] 1. The state of burning.
2. (Chem.) The combination of a combustible with a supporter of combustion, producing heat, and sometimes both light and heat.
Combustion results in common cases from the mutual chemical action and reaction of the combustible and the oxygen of the atmosphere, whereby a new compound is formed.
Ure.
Supporter of combustion (Chem.), a gas, as oxygen, the combination of which with a combustible, as coal, constitutes combustion.