adjective
a word that describes or modifies a noun or pronoun, in this case 'unsurprised' describes someone who is not surprised
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She was unsurprised by the results of the study, as they aligned perfectly with her predictions.
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I'm unsurprised that he didn't show up to the party, he's always flaky like that.
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I was totally unsurprised when she failed the test, she never studies!
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His lack of reaction to the news left me unsurprised, as if he already knew it was coming.