Questionable
Questionable adjective - Giving good reason for being doubted, questioned, or challenged.
Simple is an antonym for questionable.
Simple
Simple adjective - Having no exceptions or restrictions.
Usage example: that's the simple truth
Questionable is an antonym for simple.
Both words in one sentence
- This increased life span is not dependent on the suffering of others or any other questionable method — it's just a simple equation.
Source: Wizards Live Longer -
Tragic Dream: Nier's simple dream to live a healthy, happy life with Yonah leads to all sorts of questionable behaviour and heartbreaking decisions, and is ultimately doomed to failure anyway.
Source: Video Game / NieR -
Whether or not any particular species would've rated as "sentient" is questionable; although a few of them did leave evidence of tool use, and one (Neanderthals) left evidence of simple musical instruments, and possibly art as well.
Source: Loads and Loads of Races
Cite this Source
Simple and Questionable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/questionable/simple
Questionable & Simple. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/questionable/simple>.
Simple or Questionable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/questionable/simple.
Google Ngram Viewer shows how "questionable" and "simple" have occurred on timeline