nightmare

US /ˈnaɪtˌmɛr/

UK /ˈnaɪtmeə(r)/

A2
n. (c./u.)Noun (Countable/Uncountable)Frightening, difficult or displeasing experience
It was a nightmare trying to get home through that traffic
n. (c./u.)Noun (Countable/Uncountable)Frightening or upsetting dream while sleeping
I had a nightmare about being chased by a ghost
n. (c./u.)Noun (Countable/Uncountable)A situation or experience that is extremely unpleasant or difficult to deal with.
For many families, the holidays can be a financial nightmare.

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