No, "hideous" is not a euphemism; it is an adjective used to describe something that is extremely ugly or unpleasant. Euphemisms are words or phrases used to soften or mask the harshness of reality, while "hideous" conveys a strong, negative judgment directly. Therefore, it does not serve the purpose of a euphemism.
peculiar
A euphemism for "hideous" could include terms like "unattractive," "less than appealing," or "visually challenged." These phrases soften the impact of the word while conveying a similar meaning. Using such euphemisms can make criticism feel less harsh or offensive.
A euphemism for the word "hideous" could be "unattractive" or "less than pleasing." These terms soften the impact of the original word while still conveying a sense of disfavor regarding appearance. Another option might be "not to everyone's taste," which adds a subjective nuance.
Peculiar can be considered a euphemism for the other three, so that means one of the other three would not be one.
Do you think that person is hideous? What a hideous looking doll!
more hideous, most hideous
more hideous, most hideous
eg: You cant wear that top, it is hideous! Look at his shoes, how hideous!
euphemism for helper
Medusa had a hideous hairdo.
euphemism of ugly
euphemism for helper