nonentity
noun uk/ˌnɒnˈen.tɪ.ti/ us/ˌnɑːˈnen.t̬ə.t̬i/
[ C ] disapproving没有个性（或想法、影响）的人；无足轻重的人
a person without strong character, ideas, or influence
She was once a political nonentity, but has since won a formidable reputation as a determined campaigner. 她一度在政界无足轻重，但后来因在竞选中意志坚定而赢得盛誉。
[ U ]毫无特色；缺乏见解；无足轻重
the fact that something or someone is not known about because of not having any strong character, ideas, or influence
This collection of essays is saved from nonentity by the stature of the contributors. 因作者声誉较高，这本文集才不至归于沉寂。