credulus

From crēdō (“to believe”) +‎ -ulus (“-ing”).

• (Classical Latin) IPA^(key): [ˈkreː.dʊ.ɫʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈkrɛː.d̪u.lus]

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

1. that easily believes a thing, easy of belief
   • 8 CE, Ovid, Fasti 4.311–312:

     cōnscia mēns rēctī fāmae mendācia rīsit,
     sed nōs in vitium crēdulā turbā sumus

     Her mind knew [her own] innocence, and laughed at the malicious gossip,
     but we – as a crowd, we easily believe in [someone else’s] fault.
     (See Claudia Quinta.)

2. credulous, gullible
3. trusting, trusting in
4. full of confidence in, confiding in

First/second-declension adjective.

• crēdulitās
• incrēdulus

• “credulus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “credulus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• "credulus", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• credulus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.