lurk

verbs

lie in wait, lie in ambush, behave in a sneaky and secretive manner
lurk, skulk
is derived from
lurker
be about
"The high school students like to loiter in the Central Square"; "Who is this man that is hanging around the department?"
footle, hang around, lallygag, linger, loaf, loiter, lollygag, lounge, lurk, mess about, mill about, mill around, tarry
wait in hiding to attack
ambuscade, ambush, bushwhack, lie in wait, lurk, scupper, waylay
is derived from
lurker