nightmare

US /ˈnaɪt.mer/
UK /ˈnaɪt.mer/
"nightmare" picture
1.

a terrifying dream in which the dreamer experiences feelings of helplessness, extreme anxiety, or sorrow

:
•
I woke up in a cold sweat after having a terrible nightmare.
•
Children often have nightmares about monsters.
:
bad dreamterror dream
2.

a very unpleasant or frightening experience or situation

:
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The traffic jam was an absolute nightmare.
•
Dealing with the bureaucracy was a complete nightmare.
:
ordealtormenthelltrialmisery