Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unreached is an adjective meaning "inaccessibly located or situated". It carries one recorded sense.
inaccessibly located or situated
“an unapproachable chalet high in the mountains”
“an unreachable canyon”
“the unreachable stars”
Definitions, synonyms and semantic relations for unreached come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.