Difficult
Difficult adjective - Requiring considerable physical or mental effort.
Sour and difficult are semantically related. In some cases you can use "Sour" instead an adjective "Difficult".
Nearby Word: difficulty
Mutual synonyms
Both words in one sentence
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Sour Supporter: Kai has one, who he keeps because (aside from the fact that hacking his personality would be too difficult) he needs someone to argue with him.
Source: Creator / Brandon Sanderson -
Knight in Shining Armor: Mao fancies himself as one for C.C., though later begins to act like a Knight in Sour Armor when things become more difficult for him.
Cite this Source
Sour and Difficult. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/difficult/sour
Difficult & Sour. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/difficult/sour>.
Sour or Difficult. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/difficult/sour.
Google Ngram Viewer shows how "difficult" and "sour" have occurred on timeline