nightmarious

English

Etymology

From nightmare +‎ -ious.

Adjective

nightmarious (comparative more nightmarious, superlative most nightmarious)

1. (rare) having qualities of a nightmare
   • 1920, Joan Conquest, Desert Love, page 137:

     And they fell in showers from the purple bougainvillaea which trailed its length over the wrought arch above the gate, of which one half swung back by the hand of the biggest, blackest man ever dreamed of in nightmarious slumber.

   • 1922, G.B.Arthur, “Stay off the Pike”, in Motor Life Including Motor Print - Volume 17 - Page 42‎^[1]:

     It was a nightmarious experience.

Synonyms

• nightmarish