flammable
adj.adj. describing something that catches fire very easily and burns quickly. You often see this word on warning labels for liquids or gases.
adj. capable of being easily ignited and of burning with extreme rapidity. Often used as a safety warning on hazardous materials.
Be careful because this cleaning liquid is highly flammable.
The fire spread quickly through the warehouse because the curtains were made of a highly flammable synthetic fabric.
Safety regulations require all industrial chemicals to be stored in specialized containers that prevent the accidental ignition of flammable vapors during transport.
Back-formation from inflammable, which is used to avoid confusion with non-flammable, as the prefix in- is often used to mean "un-; non-", although it was originally meant in a sense closely related to en-.
Often used interchangeably with 'inflammable', which carries the same meaning despite the 'in-' prefix.
This wood is non-flammableThis wood is non-flammable / flame-resistantLearners sometimes assume 'inflammable' is the opposite of 'flammable' because of the 'in-' prefix, but both words mean the same thing; the true opposite is 'non-flammable'.