nightmarish
adjective
[ ˈnʌɪtmɛːrɪʃ ]
• of the nature of a nightmare; very frightening or unpleasant.
• "a nightmarish vision of the future"
Similar:
unearthly,
monstrous,
ghostly,
spine-chilling,
horrific,
macabre,
hideous,
unspeakable,
gruesome,
grisly,
ghastly,
harrowing,
hair-raising,
disturbing,
Kafkaesque,
scary,
creepy,
phantasmagorical,
