Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
soot-black is an adjective meaning "of the black color of soot". It carries one recorded sense.
of the black color of soot
Definitions, synonyms and semantic relations for soot-black come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.