nightmare

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

cauchemar

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.
Je me suis réveillé en sueur après avoir fait un terrible cauchemar.
Children often have nightmares about monsters.
Les enfants font souvent des cauchemars à propos de monstres.
2.

cauchemar, expérience horrible

a very unpleasant or frightening experience or situation

:
The traffic jam was an absolute nightmare.
L'embouteillage était un véritable cauchemar.
Dealing with the bureaucracy was a complete nightmare.
Gérer la bureaucratie était un cauchemar complet.