Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unsoluble is an adjective meaning "not easily solved". It carries one recorded sense.
not easily solved
“an apparantly insolvable problem”
“public finance...had long presented problems unsolvable or at least unsolved”
Definitions, synonyms and semantic relations for unsoluble come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.