ADJ-GRADED 偷偷摸摸的;鬼鬼祟祟的;秘密的 If you describe someone's behaviour as furtive, you disapprove of them behaving as if they want to keep something secret or hidden. 偷偷摸摸的;鬼鬼祟祟的;秘密的 [disapproval]
With a furtive glance over her shoulder, she unlocked the door and entered the house.