lurk

Universal Words verb [V] 1 [usually +adv./prep.] to wait somewhere secretly, especially because you are going to do sth bad or illegal: Why are you lurking around outside my house? * A crocodile was lurking just below the surface. 2 when sth unpleasant or dangerous lurks, it is present but not in an obvious way: At night, danger lurks in these streets. * a lurking doubt / suspicion