English edit

Etymology 1 edit

Verb edit

underthought

  1. simple past and past participle of underthink

Etymology 2 edit

under +‎ thought

Noun edit

underthought

  1. An unexpressed thought that lies below or informs another thought; a subtext or ulterior motive.
    • 1974, John Boorman, Zardoz, London: Pan Books, page 32:
      "That all sounds respectably scientific but what is May's underthought."