non-existent
/ˌnɒn ɪɡˈzɪstənt/ (bre, ipa) · /ˌnɑːn ɪɡˈzɪstənt/ (ame, ipa)
non-existent — adjective
1. describing something that has no actual existence — either because it was never
describing something that has no actual existence — either because it was never made, is no longer around, or cannot be found where you expect it.
Rachid checked the storage room twice, but the missing files were simply non-existent.
collocation: non-existent [concrete object]
The CEO dismissed the merger rumors as completely non-existent.
Sivan's visa application stalled when the embassy stated that the required documents were non-existent.
The shelter marked on the map was non-existent — the hikers found only a wooden signpost.
用法筆記
Both spellings — non-existent (with hyphen) and nonexistent (closed) — are correct. The hyphenated form is more common in British English; the closed form is standard in American English.