nightmare; bad dream
Refers to a frightening or unpleasant dream. Also used metaphorically for a terrible situation or experience.
昨夜、悪夢を見て目が覚めた。
Last night I had a nightmare and woke up.
その事故はまるで悪夢のようだった。
The accident was like a nightmare.
Last night I had a scary nightmare.
He's tormented by nightmares every night.
The accident was like a nightmare.