English edit

Etymology edit

hideous +‎ -ly

Adverb edit

hideously (comparative more hideously, superlative most hideously)

  1. In a hideous manner.
  2. (degree) To an extreme degree
    • 1994 February 20, Anne Groer, “Sunday Travel: Tips”, in The Washington Post:
      Pack a larger-than-normal hypochondria kit that includes sunscreen, plastic bandages and allergy pills. Such things are hard to find or hideously expensive.