口火|くちびkuchibi[0]heiban (flat)

1. nounfuse; pilot light
2. nouncause (of a war, argument, revolt, etc.); origin; trigger

• Synonym種火たねびNeutralA small flame kept for lighting fires, also figuratively a lingering spark of feeling, as in 「希望の種火」; 「口火」 usually means the start of something.
• Antonym結末けつまつNeutralThe outcome or conclusion of a matter, as in 「意外な結末」; it stands opposite 「口火」, which marks the beginning.
• Antonym終わりおわりCasualColloquial word for the end of something; it is the opposite of 「口火」, which ignites the start.

Use 「口火を切る」 for speaking first or setting off an event, as in 「議論の口火を切る」; 「種火」 is a small fire kept for lighting; the opposites are 「結末」 and 「終わり」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 火縄銃ひなわじゅうや火薬かやくを発火はっかさせるための火ひ。
2. ガス器具きぐでガスに点火てんかするための小ちいさな火ひ。
3. 事件じけんなどがおこるきっかけ。発端ほったん。