偶尔使用。在柯林斯辞典中， surreptitious 是3万个最常用词之一。
英式英语: surreptitious ADJECTIVE
A surreptitious action is done secretly.
He made a surreptitious entrance to the club through the little door in the brick wall.
surreptitious 的定义—— 柯林斯 英语词典
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