Etymologically

Etymology and origin of the Latin word infandus

Confidence
Established
Formation
Derivation
First attested
190–159 BC, Terence
Ultimate origin
Proto-Indo-European (*bʰeh₂-)

Pronunciation

  • Classical: [ĩːˈfan.dʊs][1]
  • Ecclesiastical: [iɱˈfan.dus][1]

Forms

īnfandus (feminine īnfanda, neuter īnfandum); first/second-declension adjective[1] The superlative īnfandissimus is perhaps found only in a tragedy of Varius.[2][3]

Etymology

It is from Latin in- + fandus (“to be spoken”), the negated gerundive of for (“to speak”), like nefandus.[2][3][1] The verb for goes back to Proto-Italic *fā- and Proto-Indo-European *bʰeh₂- (“to speak”).[4] Cognate with Ancient Greek φημί (phēmí, “I say”).[4]

Earliest recorded meaning

Köbler's first source is Terence.[5]

Semantic evolution

It means too horrible to be spoken of, unspeakable, monstrous or accursed, as in Cicero's “a cruel and unspeakable thing”.[2][6] Livy uses it of banquets of human flesh and of murders, and Virgil of grief, love, war and the Cyclopes.[6] The neuter is used as an exclamation, as in Virgil's “our ships are lost – unspeakable!”[6]

Church Latin glosses it “unspeakable, unheard of”.[7]

Timeline

  • 190–159 BC – Terence.[5]
  • 81–43 BC – Cicero of a cruel deed.[6][5]
  • 70–19 BC – Virgil of grief and as an exclamation.[6][5]
  • 59 BC–17 AD – Livy of cannibal feasts.[6][5]

Meanings

Adjective

  1. Unspeakable, monstrous, abominable, accursed.[2][6][1]

References

  1. ^ a b c d e 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 Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ 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
  5. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b c d e f g Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Infandus.” Etymologically, 19 Oct. 2026, etymologically.com/la/infandus. Accessed 20 Oct. 2026.

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