Merriam-Webster's Collegiate® Dictionary, 11th Edition
UGLY
I. adjective (uglier; -est)
Etymology: Middle English, from Old Norse uggligr, from uggr fear; akin to Old Norse ugga to fear
Date: 13th century
frightful , dire ,
2. offensive to the sight ; hideous , offensive or unpleasant to any sense, morally offensive or objectionable ,
4. likely to cause inconvenience or discomfort , surly , quarrelsome , uglily adverb
II. adverb
Date: 14th century
in an ugly manner