Auxiliary and Required

Auxiliary

Auxiliary adjective - Available to supply something extra when needed.
Usage example: the auditorium has an auxiliary cooling system used only on particularly sweltering days

Required is an antonym for auxiliary.

Required

Required adjective - Forcing one's compliance or participation by or as if by law.

Auxiliary is an antonym for required.

Nearby Words: requirement, requiring

Both words in one sentence

  • Galactic privateers get a paycheck and an auxiliary Navy rank, but they are required to obey Galactic law and follow orders from lawful superiors.
  • Chronic Pet Killer Since the only penalty for losing an animal companion is the ritual required to call a new one (unlike most other pets or auxiliary characters), using them as semi-disposable "meat shields" is a viable strategy.
Cite this Source
Required and Auxiliary. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/auxiliary/required
Auxiliary & Required. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/auxiliary/required>.
Required or Auxiliary. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/auxiliary/required.
Google Ngram Viewer shows how "auxiliary" and "required" have occurred on timeline