Difficult
Difficult adjective - Requiring considerable physical or mental effort.
Frightful and difficult are semantically related. In some cases you can use "Frightful" instead an adjective "Difficult".
Nearby Word: difficulty
Mutual synonyms
Cite this Source
Frightful and Difficult. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/difficult/frightful
Difficult & Frightful. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/difficult/frightful>.
Frightful or Difficult. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/difficult/frightful.
Google Ngram Viewer shows how "difficult" and "frightful" have occurred on timeline