1To emit sparks; to give off sparks (literally), as when metal is cut, ground, or welded.
金属を削ると火花を散らすので、保護メガネが必要だ。
When you grind metal it gives off sparks, so protective goggles are necessary.
溶接作業中は火花を散らすことが多い。
Welding work often produces sparks.
焚き火が風で火花を散らした。
The campfire scattered sparks in the wind.
2Figuratively, to engage in a heated argument or fierce contention; to clash intensely (as if sparks fly).
取引先との会議で双方の代表が火花を散らした。
The representatives of both sides clashed fiercely at the meeting with the client.
試合中、両チームの選手が火花を散らす激しい攻防を見せた。
During the match, players from both teams showed an intense back-and-forth, as if sparks were flying.
討論番組でコメンテーター同士が火花を散らした。
Commentators on the debate show exchanged heated arguments.