spookish

1. (informal) Frightening or unnerving in the manner of something eerie or supernatural; spooky.Examples: "I hope we find some nicer spot than this. This looks so lonely and spookish."; "Religion is everywhere a gauge of respectability. . . . The right to participate, however humbly, in His august and transcendental operations offers a powerful satisfaction to the will to power; the same privilege, on a smaller scale, is what takes hordes of human blanks into the Freemasons and other such spookish amalgamations of nonentities."informal

2. (informal, often of a horse or other animal) Easily startled, frightened, or unnerved.Examples: "In those moments thus spent in composing myself for sleep, I sometimes wondered in the last human occupant of the room were not a dead one. I was senselessly spookish about such things."; "As a lesson horse she needs to gain confidence in her rider, or can become spookish over the jumps, dodging out of them."Synonyms: skittishinformaloften