horrible or frightful to the senses; repulsive; very ugly: a hideous monster.
2.
shocking or revolting to the moral sense: a hideous crime.
3.
distressing; appalling: the hideous expense of moving one's home to another city.
Origin: 1275–1325; Middle English hidous < Old French hisdos, equivalent to hisde horror, fright (perhaps < Old High German *egisida, akin to egisôn, agison to frighten) + -os-ous; suffix later assimilated to -eous