S: (v) preoccupy (engage or engross the interest or attention of beforehand or occupy urgently or obsessively) "His work preoccupies him"; "The matter preoccupies her completely--she cannot think of anything else"
S: (v) haunt, obsess, ghost (haunt like a ghost; pursue) "Fear of illness haunts her"
S: (v) prepossess (cause to be preoccupied) "The idea of his failure prepossesses him"