ultroneous

U1L1T1R1O1N1E1O1U1S1
/ʌlˈtɹoʊniəs/

adjective

spontaneous; voluntary

OriginLatin ultroneus →
Scrabble 10
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Meanings

adjectiveultroneous (comparative more ultroneous, superlative most ultroneous)

comparative more ultroneous · superlative most ultroneous

  1. archaicspontaneous; voluntary

Synonyms & antonyms

Also see
acquiescentwilling

Origin

  1. Latinultroneus
  2. Englishultroneous

From Latin ultroneus, from ultro (“to the further side, on his part, of one's own accord”). See ultra-.

More words from Latin

Full word history & related roots →
Cite this entry
APA

ultroneous. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/ultroneous

MLA

“ultroneous.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ultroneous. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “ultroneous,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/ultroneous.

Source: ultroneous on Wiktionary, CC BY-SA 4.0.