furtive /ˈfɜːtɪv/ TEM8

• 1. 

  ADJ If you describe someone's behaviour as furtive, you disapprove of them behaving as if they want to keep something secret or hidden. 鬼鬼祟祟的 [表不满]

  例：

  With a furtive glance over her shoulder, she unlocked the door and entered the house.

  随着越过其肩的鬼鬼祟祟的一瞥，她打开锁进了那房子。