nightmare
Nightmare (noun) means a frightening or unpleasant dream. Example: “The child had a nightmare about being lost in a dark forest.”
How to use nightmare
Learner’s notesIn plain EnglishA scary dream, or by extension any awful, stressful experience.
The "mare" in nightmare has nothing to do with horses — it comes from an old word for a demon.
Word forms
- Plural
- nightmares
- Third person singular
- nightmares
- Past tense
- nightmared
Fill the gap
Can you complete this real example?
The child had a _____ about being lost in a dark forest.
Etymology
From Middle English nightmare, from night plus mare, an old word for an evil spirit believed to sit on a sleeper's chest and cause suffocating dreams — not related to the horse sense of "mare."
Related words
Rhymes for nightmare
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