Etymologically

Etymology and origin of the Latin word mendosus

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin mendum
Etymology tree
inherited borrowed derived
Latin mendum
Latin mendosus
From the same root
Latin menda ← mendum
Latin mendicus ← mendum
Latin mendose ← mendosus

Pronunciation

  • Classical: [mɛnˈdoː.sʊs][1]
  • Ecclesiastical: [menˈdɔː.s̬us][1]

Forms

mendōsus (feminine mendōsa, neuter mendōsum, superlative mendōsissimus); first/second-declension adjective[1]

Etymology

It is from Latin mendum (“fault, blemish”) + -ōsus (“full of”).[2][1][3] De Vaan reconstructs Proto-Italic *m(e)ndo- for mendum; if Old Irish mind (“sign, mark”) is cognate, beside mennar (“blemish”), it is an Italo-Celtic word, and he mentions only as theoretical possibilities a derivation from Proto-Indo-European *mn- (“to think”).[4]

Earliest recorded meaning

Köbler records it first in Cicero,[5] who writes in De oratore that both to lack a part and to have too much is mendosum, “faulty”.[2]

Semantic evolution

Its basic sense is full of faults or blemishes: Ovid uses it of the face of a horse with blemishes, and Pliny the Younger of a faulty copy of a will.[2][6][7] Cicero complains that funeral eulogies have made Roman history mendosior, more full of errors.[2][7] Horace and Ovid apply it to character and morals with faults.[2][7] Cicero also uses it actively, of a slave who always made a mistake at the same place in the name Verrucius.[2][7] By confusion with mendāx it comes to mean lying, deceitful, as in Apuleius' mendoso risu, “with a false laugh”.[2] Augustine complains of being worn out by very faulty manuscripts.[7] Medieval writers in Britain use it of faulty copies of texts, of people prone to falsehood, and in a glossary of what is stained or dirty;[8] Niermeyer gives the medieval sense fallacious, deceptive.[9]

Timeline

  • 81–43 BC – Cicero uses it of what is faulty and of a clerk who makes mistakes.[2][5]
  • 65–8 BC – Horace applies it to a character with a few faults.[2][5]
  • 43 BC–18 AD – Ovid uses it of a blemished face and of faulty morals.[2][5]
  • c. 125–175 AD – Apuleius uses it in the sense lying, deceitful.[2][5]
  • 354–430 AD – Augustine uses it of faulty manuscripts.[7][5]
  • Medieval Latin – It is used of faulty copies of texts and of untruthful people.[8][9]

Meanings

Adjective

  1. Full of faults or blemishes, faulty; of statements and texts, incorrect, erroneous.[2][6]
  2. Of character, full of moral faults.[7]
  3. Making mistakes, prone to error.[2][7]
  4. Lying, deceitful (by confusion with mendāx).[2][9]
  5. (Medieval Latin) Stained, dirty.[8]

Word family

  • mendositas

Usage notes

Persius uses the neuter as an adverb: mendosum tinniat, “ring false”, of brass under gold.[2][7]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ a b c d e f g h i Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  8. ^ 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
  9. ^ a b c Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill

Derived terms

Cite this entry

“Mendosus.” Etymologically, 20 Oct. 2026, etymologically.com/la/mendosus. Accessed 22 Oct. 2026.

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