Obsessed (by an idea, threat, etc.).
Of a location, frequented by a ghost or ghosts.
Showing a feeling of being disturbed.
Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
Used by or relating to insane people.
Causing insanity or madness.
Extremely good; incredibly amazing.
Characterized by insanity or the utmost folly; ridiculous; impractical.