Etymologically

credulus

Etymology and origin of the Latin word credulus

Confidence
Established
Formation
Derivation
First attested
Cicero
Ultimate origin
Proto-Indo-European (*ḱred-dʰeh₁-)
Etymology tree
inherited borrowed derived
Latin credo
English recreant
Latin credulus
English credulous

Pronunciation

  • IPA (Classical): [ˈkreː.dʊ.ɫʊs][1]
  • IPA (Ecclesiastical): [ˈkrɛː.du.lus][1]

Forms

crēdulus (feminine crēdula, neuter crēdulum); first/second-declension adjective[1]

Etymology

It is from Latin crēdō (“to believe, trust”) + -ulus.[2][1][3] Crēdō is *krezde/o-, from Proto-Indo-European *ḱred-dʰeh₁- (“to place in the heart”), “to believe”.[4]

Earliest recorded meaning

Köbler's first source is Cicero (81–43 BC).[5] Cicero says the most foolish character in comedy is the improvident and credulous old man.[6]

Semantic evolution

It meant, of persons, prone to believe or trust, credulous.[2] Cicero speaks of a foolish and credulous listener and says he willingly shows himself credulous.[7] With a dative it meant trusting someone, as in Virgil and Horace, and Ovid uses it of a fish and Horace of cattle.[7][8] Seneca calls ships credulae, venturesome.[8]

In medieval Latin it meant believing, devout, and trusted, and as a noun a faithful follower.[9][5] English credulous was borrowed in the 1570s.[10]

Timeline

  • 81–43 BC – Cicero uses it of credulous old men in comedy.[6][5]
  • 70–19 BC – Virgil uses it with a dative.[8][5]
  • 4 BC–65 AD – Seneca uses it of venturesome ships.[8][5]
  • 1570s – English credulous is borrowed.[10]

Meanings

Adjective

  1. Prone to believe, credulous, gullible.[2][1]
  2. Trusting (in), confiding.[2][1]
  3. (Medieval Latin) Believing, devout; trusted.[9]

Word family

  • crēdulitās
  • incrēdulus
  • crēdibilis
  • crēdibiliter
  • crēditor
  • crēditrīx
  • crēditum
  • crēdō
  • incrēdibilis
  • incrēdibilitās
  • incrēdibiliter
  • incrēditus
  • English credulous

References

  1. ^ a b c d e f 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. ^ 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 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 Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  8. ^ a b c d Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  9. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  10. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Borrowed into

Cite this entry

“Credulus.” Etymologically, 15 Oct. 2026, etymologically.com/la/credulus. Accessed 15 Oct. 2026.

Last edited on . ·