All About the French Word un Cauchemar

They always come out at night
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The French word "un cauchemar," which is pronounced "ko-sheu-mahr," means "nightmare."

Examples

Avez-vous jamais eu un cauchemar? - Have you ever had a nightmare?

Cet examen d'histoire va être un cauchemar! - This history test is going to be a nightmare!​

Related: cauchemarder - to have a nightmare; cauchemardesque (adj) - nightmarish; cauchemardeux (adj) - nightmarish