Etymologically

obtestatio

Etymology and origin of the Latin word obtestatio

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin testis
Etymology tree
inherited borrowed derived
Latin obtestor
Latin obtestatio

Forms

obtestātiō f (genitive obtestātiōnis); third declension[1]

Etymology

It is from Latin obtestor (“to call to witness, implore”) + -tiō.[2][3][1][4] The verb is a compound of ob- and testor, which can be derived directly from testis (“witness”);[5] de Vaan explains the noun as “the third standing by”, from Proto-Italic *tri-sto/i-.[5]

Earliest recorded meaning

Its earliest uses are in Cicero, who in the speech for Balbus speaks of laws made binding by a solemn invocation and consecration.[2][6]

Semantic evolution

Festus defines it as calling a god to witness for good, as opposed to dētestātiō, for ill.[7][3] It meant a solemn oath or invocation, as in Livy's “they drew up an oath”,[2][6] and then an earnest entreaty or appeal: Cicero speaks of a husband's appeal in the Pro Cluentio, and Nepos, Livy and Tacitus use it of supplications, Tacitus of the senate stooping to the most abject entreaties.[2][8][6]

In British medieval sources it is an invocation of the divine name, a solemn charge with a warning or threat, and a warning.[9]

Timeline

  • 81–43 BC – Cicero uses it of a solemn invocation and of an earnest appeal.[2][10]
  • c. 100–24 BC – Nepos uses it of entreaty.[8][10]
  • 59 BC–17 AD – Livy uses it of an oath and of supplications.[6][8][10]
  • 98–115 AD – Tacitus speaks of abject entreaties.[6][10]

Meanings

Noun

  1. A calling to witness, solemn invocation; an oath.[2][7][6]
  2. An earnest entreaty, solemn appeal, adjuration.[2][1]
  3. (Medieval Latin) A solemn charge carrying a warning or threat; a warning.[9]

Usage notes

Festus contrasts it with dētestātiō, in which a god is called to witness for harm.[7][3]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ Bianchi, Rossella; Lelli, Olga (2014), VOLI: Vocabolario di latino, Florence: Le Monnier
  5. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  6. ^ a b c d e f Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  7. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  8. ^ a b c Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  9. ^ a b 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
  10. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Obtestatio.” Etymologically, 20 Oct. 2026, etymologically.com/la/obtestatio. Accessed 22 Oct. 2026.

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