Usually means: In a terrifyingly and horribly manner.
Definitions Related words Mentions History
We found 12 dictionaries that define the word nightmarishly:

General (10 matching dictionaries)
  1. nightmarishly: Merriam-Webster
  2. nightmarishly: Oxford Learner's Dictionaries
  3. nightmarishly: Collins English Dictionary
  4. nightmarishly: Vocabulary.com
  5. nightmarishly: Wordnik
  6. nightmarishly: Cambridge Advanced Learner's Dictionary
  7. nightmarishly: Wiktionary
  8. nightmarishly: Dictionary.com
  9. Nightmarishly: Wikipedia, the Free Encyclopedia
  10. nightmarishly: TheFreeDictionary.com

Medicine (2 matching dictionaries)
  1. nightmarishly: Merriam-Webster Medical Dictionary
  2. nightmarishly: Medical dictionary

(Note: See nightmare as well.)

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Definitions from Wiktionary (nightmarishly)

▸ adverb:  In a nightmarish manner.

Similar:
terrifyingly, hellishly, horrifyingly, scarily, horrifically, horridly, horrendously, tormentingly, hauntingly, frighteningly, more...

Opposite:
pleasantly, beautifully, wonderfully, delightfully

Types:
horrifying, terrifying, scary, spooky, creepy, eerie, more...

▸ Words similar to nightmarishly

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Similar:
terrifyingly, hellishly, horrifyingly, scarily, horrifically, horridly, horrendously, tormentingly, hauntingly, frighteningly, more...

Opposite:
pleasantly, beautifully, wonderfully, delightfully

Types:
horrifying, terrifying, scary, spooky, creepy, eerie, more...



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