Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
inauthentic is an adjective meaning "false or fake; not what it appears to be". It carries one recorded sense.
false or fake; not what it appears to be
“a spurious work of art”
Definitions, synonyms and semantic relations for inauthentic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.