资料来源 : pyDict

无特色的,平凡的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Featureless \Fea"ture*less\ (?; 135), a.
   Having no distinct or distinctive features.

资料来源 : WordNet®

featureless
     adj : lacking distinguishing characteristics or features; "the
           featureless landscape of the steppe"