adjective.
Repulsive, especially to the sight; revolting. synonym: ugly.
adjective.
Morally offensive; detestable.
adjective.
Causing great harm or fear; terrible.
The Century Dictionary and Cyclopedia
Frightful in appearance, sound, or character; very dreadful; horrible; detestable; revolting: as, a hideous monster; a hideous uproar; hideous debauchery.
SynonymsGrim, Grisly, etc. (see ghastly); horrid, terrible, appalling.
the GNU version of the Collaborative International Dictionary of English
adjective.
Frightful, shocking, or offensive to the eyes; dreadful to behold.
adjective.
Distressing or offensive to the ear; exciting terror or dismay.