Intelligent
Intelligent adjective - Having or showing quickness of mind.
Usage example: his intelligent response to the emergency averted a disaster
Simple is an antonym for intelligent.
Simple
Simple adjective - Lacking in education or the knowledge gained from books.
Usage example: the fact that he didn't go to college doesn't mean he's simple
Both words in one sentence
- Or sometimes, more intelligent characters are overthinking it and the simple guy is the only one to think of Stating the Simple Solution (especially if it involves Cutting the Knot).
Source: Dumbass Has a Point - To begin with something simple, the 1913 edition of Webster's Revised Unabridged Dictionary offers this: "One who disbelieves or denies the existence of a God, or supreme intelligent Being."
Source: Useful Notes / Atheism -
Serial killers are more likely to be highly intelligent, but it may be a simple selection effect.
Cite this Source
Simple and Intelligent. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/intelligent/simple
Intelligent & Simple. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/intelligent/simple>.
Simple or Intelligent. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/intelligent/simple.
Google Ngram Viewer shows how "intelligent" and "simple" have occurred on timeline