credulous

UK: /ˈkrɛdʒʊləs/ US: /ˈkrɛdʒələs/ ,(krej′ə ləs)

WordReference Random House Learner's Dictionary of American English © 2026

cred•u•lous /ˈkrɛdʒələs/   adj. 

1. willing to believe or trust too readily; gullible:
   He's so credulous that he will believe anything you say.

cre•du•li•ty /krɪˈdulɪti, -ˈdyu-/  n. [uncountable]
cred•u•lous•ly, adv. 
cred•u•lous•ness, n. [uncountable] See -cred-.

WordReference Random House Unabridged Dictionary of American English © 2026

cred•u•lous  (krej′ə ləs), adj. 

1. willing to believe or trust too readily, esp. without proper or adequate evidence;
   gullible.
2. marked by or arising from credulity:
   a credulous rumor.

• Latin crēdulus, equivalent. to crēd(ere) to believe + -ulus adjective, adjectival suffix denoting a quality or tendency; see -ous
• 1570–80

cred′u•lous•ly, adv. 
cred′u•lous•ness, n. 
Synonyms

• 1. believing, trustful, unsuspecting.

Collins Concise English Dictionary © HarperCollins Publishers::

credulous / ˈkrɛdjʊləs/ adjective

1. tending to believe something on little evidence
2. arising from or characterized by credulity: credulous beliefs

Etymology: 16th Century: from Latin crēdulus, from crēdere to believe

ˈcredulously adverb

ˈcredulousness noun