noun, noun or participle which takes 'suru', intransitive verb
ignition; catching fire; combustion
Used when something starts burning or ignites, often suddenly or because of heat, electricity, or a fault. As 発火する it is intransitive: the thing itself catches fire.
バッテリーが突然発火した。
The battery suddenly caught fire.
高温になると、油
Oil can ignite when it reaches a high temperature.
noun, noun or participle which takes 'suru', intransitive verb
firing a blank cartridge; blank discharge
Specialized firearm-related use for a discharge without bullets, such as firing a blank. This is much less common for learners than the ordinary 'ignite/catch fire' sense.
銃器の文脈では、「発火」が空砲の発射を指すことがある。
In firearm contexts, 発火 can refer to the firing of a blank.
noun, noun or participle which takes 'suru', intransitive verb
event firing; triggering
Computing use for an event being fired or triggered, especially in programming discussions. Often appears as イベントが発火する.
ボタンを押すとクリックイベントが発火する。
When you press the button, the click event fires.