可か燃ねん性せい

か

ね

ん

せ

い

Meanings

1

combustibility; flammability

Refers to the property of being able to catch fire and burn. Often used in technical, safety, or regulatory contexts.

We need to test the flammability of this material.

2

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.

可か燃ねん性せいの〈物もの〉flammable (thing)
可か燃ねん性せいのガスを取とり扱あつかう際さいは換かん気きに注ちゅう意いしてください。
Please make sure to ventilate properly when handling flammable gas.
可か燃ねん性せいが高たかい／低ひくいto have a high/low flammability
このプラスチックは可か燃ねん性せいが高たかいので注ちゅう意いが必ひつ要ようだ。
This plastic has high flammability, so caution is needed.

引いん火か性せい sense 1
可燃性 broadly means a substance can burn, whereas 引火性 more narrowly refers to how easily it ignites (its flash point), often in strict regulatory contexts.
可か燃ねん sense 1
可燃 is the plain adjectival-noun form meaning combustible, while 可燃性 emphasizes the abstract property or characteristic of being combustible.

不ふ燃ねん性せい sense 1
可燃性 describes materials that can catch fire and burn, while 不燃性 describes materials that do not burn.

Compound of 可燃 (combustible) + 性 (-ity, property). 可燃 is from 可 (possible) + 燃 (burn).