Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unpaintable is an adjective meaning "not paintable especially not suitable for artistic representation on canvas". It carries one recorded sense.
not paintable especially not suitable for artistic representation on canvas
“the inexpressible, unpaintable `tick' in the unconscious”
Definitions, synonyms and semantic relations for unpaintable come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.