nightmarish

[ nahyt-mair-ish ]
/ ˈnaɪtˌmɛər ɪʃ /

adjective

resembling a nightmare, especially in being terrifying, exasperating, or the like: his nightmarish experience in a concentration camp.

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Origin of nightmarish

First recorded in 1825–35; nightmare + -ish1

OTHER WORDS FROM nightmarish

night·mar·ish·ly, adverbnight·mar·ish·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for nightmarish