"nonextant" in the adjective sense
1. extinct, nonextant
no longer in existence lost or especially having died out leaving no living representatives
"an extinct species of fish"
"an extinct royal family"
"extinct laws and customs"
2. nonextant
no longer existing or inaccessible through loss or destruction
"its nonextant original was written on vellum"- G.B.Saul
Source: WordNet® (An amazing lexical database of English)
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