spooky
adjective
[ ˈspuːki ]
• sinister or ghostly in a way that causes fear and unease.
• "I bet this place is really spooky late at night"
Similar:
eerie,
sinister,
ghostly,
uncanny,
weird,
unearthly,
mysterious,
frightening,
spine-chilling,
hair-raising,
scaring,
terrifying,
petrifying,
chilling,
creepy,
scary,
spine-tingling,
• easily frightened; nervous.
• "some horses are more spooky by nature than others"