Ugliest

adjective

1. Displeasing to the eye; not aesthetically pleasing.
2. Displeasing to the ear or some other sense.
3. Offensive to one's sensibilities or morality.

   "He played an ugly trick on us."

4. Ill-natured; crossgrained; quarrelsome.

   "an ugly temper; to feel ugly"

5. Unpleasant; disagreeable; likely to cause trouble or loss.

   "With all this competition, expect things to get ugly."