adjective
EXAMPLES FROM CORPUS
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Fortunately, his surreptitious action also turned out to be illegal.
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Solitary, masochistic, surreptitious vice, that's all he understands.
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The back avoids eye contact and confrontation, but it may invite the surreptitious gaze.
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The result was that we all kept making surreptitious trips to the staff room to refill our plastic beakers.
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Then a little light came through the uncovered spyhole, a flickering, surreptitious light.
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Women in nightdresses peeping out of roadside houses lent a surreptitious air to the first few miles.