Origin: 1570–80; <
Latin crēdulus, equivalent to
crēd(
ere) to believe +
-ulus adj. suffix denoting a quality or tendency;
see -ous Related formscred·u·lous·ly, adverb
cred·u·lous·ness, noun
non·cred·u·lous, adjective
non·cred·u·lous·ly, adverb
non·cred·u·lous·ness, noun
EXPANDo·ver·cred·u·lous, adjective
o·ver·cred·u·lous·ly, adverb
o·ver·cred·u·lous·ness, noun
un·cred·u·lous, adjective
un·cred·u·lous·ly, adverb
un·cred·u·lous·ness, noun
COLLAPSESynonyms
1. believing, trustful, unsuspecting.