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nightie
nightingale
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nightlife
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nightmare

night·mare [ nt mèr ]


noun  (plural night·mares)
Definition:
 
1. bad dream: a frightening or upsetting dream

2. traumatic experience: a traumatic, very upsetting, or extremely difficult and troublesome experience or situation

3. dreaded event: a situation or event that somebody dreads

4. evil spirit: a malign spirit formerly believed to suffocate or haunt people during sleep



adjective 
Definition:
 
extremely frightening or difficult: extremely frightening, upsetting, or difficult to deal with

[13th century. <night + Old English mære "nightmare" < Germanic]

night·mar·ish adjective
night·mar·ish·ly adverb
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