n.[C]

1. 夢魘；惡夢
   In his nightmares they burned his house.

   在他的噩夢中，他們燒了他的房子。

2. 夢魘般的經歷；恐怖的事
   Her first few days in that foreign land were a total nightmare.

   她剛到達異邦的那幾天簡直像是一場噩夢。

n.

1. a frightening or unpleasant dream.
2. a very unpleasant experience or prospect.