A small piece of partly burned wood, coal, etc. that is not yet ash and that can be burned further but without producing flames.

(烧剩而尚未成灰的)炉渣、木块等；余烬。

Slag from a metal furnace.

(金属炉 中取出之)熔渣。

Ashes.

[~s] 【口】灰。

To reduce to cinders.

使烧成灰烬。