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haunt like a ghost; pursue; "Fear of illness haunts her"
having or showing excessive or compulsive concern with something; "became more and more haunted by the stupid riddle"; "was absolutely obsessed with the girl"; "got no help from his wife who was preoccupied with the children"; "he was taken up in worry for the old woman"
be preoccupied with something; "She is obsessing over her weight"
influenced or controlled by a powerful force such as a strong emotion; "by love possessed"