Etymologically

arbitratio

Etymology and origin of the Latin word arbitratio

Confidence
Established
Formation
Derivation
First attested
c. 165 AD, Aulus Gellius
Ultimate origin
Latin arbitror
Etymology tree
inherited borrowed derived
Latin arbitror
Latin arbitratio
From the same root
Latin arbitratus ← arbitror

Forms

arbitrātiō f (genitive arbitrātiōnis); third declension[1][2]

Etymology

It is formed from Latin arbitror (“to judge, think”) + -tiō.[1][3][4]

Earliest recorded meaning

The OLD records it only as a form mentioned by Aulus Gellius beside arbitrātus, which took its place.[1] Lewis and Short give it the sense of judgment or will, equal to arbitrātus.[2]

Semantic evolution

It is rare in Antiquity: a constitution of 385 in the Theodosian Code entrusts a judgment to experts sub fideli arbitratione, though some manuscripts and editors read arbitrio there,[3][5] and Boethius uses it for an opinion.[3][5]

In Medieval Latin it became a legal word for arbitration and for an arbiter's decision, and in theology it meant careful deliberation.[6][7]

Timeline

  • c. 165 AD – Aulus Gellius mentions the form.[1][2][4]
  • 385 AD – A constitution in the Theodosian Code speaks of a faithful judgment.[3]
  • 1221 – A Westphalian charter uses it of an arbitral award.[6]
  • 1259 – A Tyrolean notarial charter uses it of arbitration proceedings.[6]
  • 1298 – A royal letter to the Pope uses it of an arbiter's decision.[7]

Meanings

Noun

  1. Judgment, will (the same as arbitrātus).[2][5]
  2. (Late Latin) An opinion.[3][5]
  3. (Medieval Latin, law) Arbitration, proceedings before arbiters.[6]
  4. (Medieval Latin, law) An arbitral award, an arbiter's decision.[6][7]
  5. (Medieval Latin, theology) Careful deliberation.[6]

Usage notes

In Martianus Capella the manuscripts have arbitrationem in the sense of a place for watching, where editors correct it to habitationem.[3]

References

  1. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  2. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  3. ^ a b c d e f Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c d Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  6. ^ a b c d e f Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  7. ^ a b c Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
Cite this entry

“Arbitratio.” Etymologically, 24 Oct. 2026, etymologically.com/la/arbitratio. Accessed 24 Oct. 2026.

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