la pesadilla - nightmare (literal or figurative), bad dream, a tightening of the chest and difficulty breathing during such a dream, extreme worrySpanish example: La corrupción será una pesadilla sin fin.
English example: The corruption will be a nightmare without end.
Source: la pesadilla - nightmare (literal or figurative), bad dream, a tightening of the chest and difficulty breathing during such a dream, extreme worry (https://www.123teachme.com/spanish_feeds/word_of_the_day/2020/8/4)