flammable

This term describes materials that catch fire with ease, often used in safety warnings and industrial labeling to signal immediate danger. It carries a high-alert connotation, emphasizing the volatility of a substance rather than just its ability to burn.

Confusion frequently arises between this word and inflammable. Despite the prefix in the latter, both words are synonymous and describe the same hazardous property. In modern safety standards, flammable is preferred because the prefix in inflammable is often misinterpreted as meaning not flammable, which could lead to catastrophic accidents.