Which of these words is not a euphemism for the other grotesque hideous peculiar abnormal?

Grotesque, hideous, peculiar, and abnormal are all adjectives that can be used to describe something that is unpleasant or unusual. However, abnormal is not a euphemism for the other words. A euphemism is a word or phrase that is used to replace a more offensive or harsh word or phrase. For example, the word "passed away" is a euphemism for "died."