Unwilling or unable to believe something; showing disbelief or skepticism. Often describes someone's reaction to surprising or hard-to-believe information.
From Latin 'incredulus,' combining 'in-' (not) and 'credulus' (believing). The root 'cred-' means 'to believe,' also found in 'credible' and 'credit.' The word entered English in the 16th century.
Don't confuse 'incredulous' (the person who doesn't believe) with 'incredible' (the thing that's hard to believe). An incredulous person gives you that 'Are you serious?' look when you tell them something amazing!
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