combustible
n. C1 Advanced UK //kəmbˈʌstəbəl// com·bustible
n. a substance that can catch fire and burn easily. You use this to describe things like paper, wood, or gasoline.
n. a substance that is capable of undergoing combustion. Often used in technical or industrial contexts to describe materials that pose a fire hazard.
Wood is a common combustible used for heating.
The warehouse must be kept clear of all combustibles to meet local fire safety regulations.
While the structural steel is designed to withstand extreme heat, the surrounding combustibles were quickly consumed by the initial flames, accelerating the spread of the fire.
From Middle French combustible, equivalent to combust + -ible.