hideous

From Middle English hidous, from Anglo-Norman hidous, from Old French hideus, hydus (“that which inspires terror”), from earlier hisdos, from Old French hisda (“horror, fear”), of uncertain and disputed origin. Probably from Frankish *egisda, *egisida (“terror, fright”), from Proto-Germanic *agisiþō (“horror, terror”), from Proto-Germanic *agisōną (“to frighten, terrorise”), from Proto-Germanic *agaz (“terror, fear”), from Proto-Indo-European *h₂egʰ- (“to frighten”). Cognate with Old High German egisa, egidī (“horror”), Old English egesa (“fear, dread”), Gothic 𐌰𐌲𐌹𐍃 (agis, “fear, terror”).

Alternative etymology cites possible derivation from Latin hispidosus (“rugged”), from hispidus (“rough, bristly”), yet the semantic evolution is less plausible.

• (UK) IPA^(key): /ˈhɪd.iː.ʌs/

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hideous (comparative more hideous, superlative most hideous)

1. Extremely or shockingly ugly.
   • Thomas Babington Macaulay.

   A piteous and hideous spectacle.

2. Having a very unpleasant or frightening sound
   • 1719, Daniel Defoe, Robinson Crusoe

     He started up, growling at first, but finding his leg broken, fell down again; and then got upon three legs, and gave the most hideous roar that ever I heard.

3. Hateful; shocking.
   • William Shakespeare

     Sure, you have some hideous matter to deliver.

4. Morally offensive; shocking; detestable.
   • 1851, Herman Melville, Moby Dick, Chapter 9:

     when the wind is shrieking, and the men are yelling, and every plank thunders with trampling feet right over Jonah’s head; in all this raging tumult, Jonah sleeps his hideous sleep.

• Nouns to which "hideous" is often applied: monster, creature, man, face, thing, crime, form, death, aspect, spectacle, picture, roar, sound, manner, way, disease, mistake, shape, dress, fact, act, smile.

• frightful, ghastly, grim, grisly, grotesque, horrid, dreadful, terrible

• hideosity
• hideously
• hideousness