Difficult
Difficult adjective - Requiring considerable physical or mental effort.
Iffy and difficult are semantically related. In some cases you can use "Iffy" instead an adjective "Difficult".
Nearby Word: difficulty
Iffy
Mutual synonyms
Both words in one sentence
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Gets iffy though when for gameplay reasons the difference becomes really marked (Espada 1 in Zero flies a starting plane and is still one of the most difficult aces in the entire game).
Source: Video Game / Ace Combat
Cite this Source
Iffy and Difficult. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/difficult/iffy
Difficult & Iffy. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/difficult/iffy>.
Iffy or Difficult. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/difficult/iffy.
Google Ngram Viewer shows how "difficult" and "iffy" have occurred on timeline