incredulous
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/ɪnˈkredʒələs/
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/ɪnˈkredʒələs/
doubtful or not believing something; showing disbelief
When she told him she had won the lottery, he looked incredulous.
그녀가 복권에 당첨됐다고 그에게 말했을 때, 그는 믿어지지 않는 표정을 짓었다.