noun
combustibility; flammability
Refers to the property of being able to catch fire and burn. Often used in technical, safety, or regulatory contexts.
この素材の可燃性を試験する必要がある。
We need to test the flammability of this material.
noun which may take the genitive case particle 'no'
combustible; flammable
Used adjectivally with の to modify nouns, e.g., 可燃性ガス (flammable gas). Common in compound terms.
可燃性の液体は火気厳禁です。
Flammable liquids are strictly prohibited near open flames.
Refers specifically to the ease of ignition (flash point), often used in stricter regulatory contexts. 可燃性 is a broader term for general combustibility.
Compound of 可燃 (combustible) + 性 (-ity, property). 可燃 is from 可 (possible) + 燃 (burn).