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