Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unobvious is an adjective meaning "not immediately apparent". It carries one recorded sense.
not immediately apparent
“in mathematical science connections are exhibited which...are extremely unobvious”
Definitions, synonyms and semantic relations for unobvious come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.