黬

It means soot-like residue, a dark spot, or a blemish.

The concrete sense is the black deposit beneath a cooking pot: the Chinese gloss 釜底黑 means “black at a pot’s bottom.” In Zhuangzi, the line 有生，黬也 compares life to this soot-like clump, gathered briefly before it scatters.

Later dictionaries and commentaries extend 黬 to a black spot, mold mark, dark center, or blemish, and connect it with 黶 and 𪒹. The Zhuangzi example appears in the “Gengsang Chu” chapter (庚桑楚), among the book’s Miscellaneous Chapters, whose layers and authorship are debated; it shows a use, not when the character began.

How should I read 黬 in a message?

Check the surrounding words before deciding.

If 黬 is sent alone, its several dictionary senses leave the intended one unclear. Ask what the sender means rather than treating it as praise, an insult, or a joke.

Nearby words about stains point toward a literal mark; a classical quotation calls for its gloss or translation.