a frightening or unpleasant dream 噩梦 I had nightmares after watching the horror movie. 我看完这部恐怖片后做了许多噩梦。 ■a terrifying or very unpleasant experience or prospect 恐怖的经历;可怕的事情 the nightmare of racial hatred. 种族仇恨的可怕经历。 an astronaut's worst nightmare is getting detached during an extra-vehicle activity. 宇航员最怕的事情就是在船外活动时与宇宙飞船分离。 ■a person, thing, or situation that is very difficult to deal with 很难对付的人(或事、情况等) buying wine can be a nightmare if you don't know enough about it. 如果你对酒知之甚少的话,买酒将会是很难对付的事情。
派生 nightmarish adjective nightmarishly adverb 语源
Middle English (denoting a female evil spirit thought to lie upon and suffocate sleepers): from night + Old English mære 'incubus'