Submitted by György Chityil ... on Fri, 01/19/2018 - 21:56 Hierarchy: AdjectiveDescription: {{obsolete|except as|_|nonstandard}} Difficult to believe; incredible. {{defdate|from 17th c.}}Ngram: incredulousNgram Text: incredulousSource: WiktionaryIssue: 0Wiktionary tag: except asnonstandardfrom 17th c.Ngram Count: 1