灰|はいhai[0]heiban (flat)

1. nounash; ashes
   すべては燃もえて灰はいとなった。↗

   Everything was burnt to ashes.

• SynonymアッシュNeutralLoanword for ash, but in Japanese it mostly appears in color and hair-color names such as 「アッシュグレー」 rather than for actual ashes.
• Related灰殻はいがらNeutralRefers to the ash residue left after something burns. Actual usage is rare; in everyday speech 「灰」 is the normal word.

For the powder left after burning, say 「灰」. 「アッシュ」 is mostly for color and hair-color names, and 「灰殻」 is uncommon in daily use.

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

1. (はい) 物ものが燃え尽もえつきたあとに残のこる粉末ふんまつ。
2. 火山かざんが噴火ふんかした際さいに排出はいしゅつする粒子りゅうし状じょうの岩石がんせき。火山灰かざんばい。