CREDULITY
credulity
(noun) tendency to believe readily
Source: WordNet® 3.1
Etymology
Noun
credulity (countable and uncountable, plural credulities)
A willingness to believe in someone or something in the absence of reasonable proof; credulousness.
Synonyms
• gullibility
Antonyms
• incredulity
Source: Wiktionary
Cre*du"li*ty (kr-d"l-t), n. Etym: [L. credulitas, fr. credulus: cf.
F. cr. See Credulous.]
Definition: Readiness of belief; a disposition to believe on slight
evidence.
That implict credulity is the mark of a feeble mind will not be
disputed. Sir W. Hamilton.
Source: Webster’s Unabridged Dictionary 1913 Edition