nonexistent

a.不存在的

nonage, nonagenarian, nonce, nonce-word, nonchalance, nonchalant, nonchalantly, noncommittal, nonconformist, nonconformity, noncontemporaneous, nondescript, none, none but, none other than, none the less, none too, nonentity, nonesuch (also nonsuch), nonetheless, nonflammable, nonmilitary, nonpareil, nonphysical, nonplus, nonporous, nonradioactive, nonsense, nonsensical, nonsensically, nonsuch, nonthreatening, nontraditional, nonverbal, nonviable, nonviolent, nonviscous, noodle, nook, noon,