nonentity

n. 无能力之人，不重要

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