Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
nonextant is an adjective meaning "no longer in existence; lost or especially having died out leaving no living representatives". It carries 2 recorded senses.
no longer existing or inaccessible through loss or destruction
“its nonextant original was written on vellum”
Definitions, synonyms and semantic relations for nonextant come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.