Etymologically

Etymology and origin of the Latin word ausus

Confidence
Established
Formation
Derivation
First attested
66 before 66 AD, Petronius More words from the 1st century
Ultimate origin
Latin audeō
Etymology tree
inherited borrowed derived
Latin aveō
Latin avidus
English avid
Latin audeō
Latin ausus
Italian oso
Derivations
From the same root
Latin avārus ← aveō
Latin avidē ← avidus
Latin aviditās ← avidus
Latin audāx ← audeō
Latin audēns ← audeō
Latin ausō ← audeō
Latin sōdēs ← audeō

Forms

ausus m (genitive ausūs); fourth declension[1]

Etymology

It is from Latin audeō (“to dare”), formed with the suffix of verbal nouns -tus.[2][3][1]

Earliest recorded meaning

Georges cites the phrase ductu ausuque suo (“under his own leadership and on his own initiative”) from the Bellum Alexandrinum.[4] The TLL treats Petronius as the first author to use it; in the poem on the civil war in the Satyricon he has the plural insolitos ausus, unaccustomed ventures.[3][5]

Semantic evolution

The word means daring and initiative, and in the plural ventures or bold undertakings.[2] After Petronius it is mostly used disapprovingly, often of the audacity of people acting against the law,[3] as in the Theodosian Code's ausu gravi atque damnabili (“with a grave and damnable presumption”).[4] Symmachus and the laws of the emperors Leo and Anthemius also have it.[6][5]

Medieval Latin used it for daring and for a daring deed,[7] in a bad sense for an outrage or for insolence, in a good one for courage and confidence;[8] Walahfrid Strabo already has it in his poem on his garden.[8]

Timeline

  • before 66 AD – Petronius speaks of unaccustomed ventures (insolitos ausus).[3][9]
  • c. 340–402 AD – Symmachus uses it in his letters.[6][9]
  • 2nd quarter of the 9th century – Walahfrid Strabo uses it in his poem on gardening.[8][9]

Meanings

Noun

  1. Daring, initiative.[2][4]
  2. (plural) Ventures, bold undertakings.[2][5]
  3. (Late Latin) A reckless or unlawful act, presumption.[3][4]
  4. (Medieval Latin) A daring deed; courage, confidence.[7][8]

Usage notes

Ausus is also the perfect participle of audeō, “having dared”.[5][6]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c d Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  5. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  7. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  8. ^ a b c d Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  9. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Ausus.” Etymologically, 13 Nov. 2026, etymologically.com/la/ausus. Accessed 14 Nov. 2026.

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