Nightmarish
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[scary] place, [extremely] alariming, resembling a [nightmare].
Nightmarish meaning & definition 1 of Nightmarish.
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Of the nature of a nightmare; very frightening or unpleasant.
Nightmarish meaning & definition 2 of Nightmarish.
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extremely unpleasant and very upsetting or frightening:
Nightmarish meaning & definition 3 of Nightmarish.