Difficult
Difficult adjective - Requiring considerable physical or mental effort.
Vicious and difficult are semantically related. In some cases you can use "Vicious" instead an adjective "Difficult".
Nearby Word: difficulty
Both words in one sentence
-
The city their Vaults are located in is described in tones reminiscent of HP Lovecraft, and the creatures themselves are something like the antagonist from Alien, only much more vicious and difficult to kill.
Source: Literature / Deathstalker - Providing a dramatic increase in health total and regeneration, the Hero carrying it becomes difficult to kill except by sustained vicious focus-fire from the enemy team.
Source: Nigh-Invulnerability - It's difficult to listen to "My Way" by Sid Vicious without realizing he recorded it just months before he murdered his partner Nancy Spungen and then took a suicidical drug overdose out of remorse.
Source: Harsher In Hindsight / Music
Cite this Source
Vicious and Difficult. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/difficult/vicious
Difficult & Vicious. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/difficult/vicious>.
Vicious or Difficult. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/difficult/vicious.
Google Ngram Viewer shows how "difficult" and "vicious" have occurred on timeline