extremely unpleasant or ugly
hideous - ugly
The word ‘hideous’ is most commonly used as a forceful, emphatic way of calling something or somebody ‘ugly’, with the implication being that it is offensive to the senses, particularly sight. However, it can also be a more general term to express something very unpleasant or difficult to bear.
I don’t know who designed the interior of the house, but the decor was simply hideous!
After the car accident, Daniel’s face was hideously scarred, which was a cause of great anguish for him.
The judge sentenced the defendant to life without the possibility of parole due to the hideousness of his crimes.