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.
例句
With a furtive glance over her shoulder, she unlocked the door and entered the house.
她鬼鬼祟祟地往身后扫了一眼，然后打开门锁进了房子。