発はっ火か

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.

• バッテリーが突とつ然ぜん発はっ火かした。

  The battery suddenly caught fire.

• 高こう温おんになると、油あぶらが発はっ火かすることがある。

  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.

• 銃じゅう器きの文ぶん脈みゃくでは、「発はっ火か」が空くう砲ほうの発はっ射しゃを指さすことがある。

  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.

• ボタンを押おすとクリックイベントが発はっ火かする。

  When you press the button, the click event fires.