incredulous
/ɪnˈkrɛʤələs/
adjective
Britannica Dictionary definition of INCREDULOUS
[more incredulous; most incredulous]
:
not able or willing to believe something
:
feeling or showing a lack of belief
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She listened to his explanation with an incredulous smile.
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He was incredulous at the news.
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Many people were incredulous that such a small fire could have caused so much damage.