Webster's English Dictionary

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ugly

ug.ly \'*g-le-\ aj [ME, fr. ON uggligr, fr. uggr fear; akin to ONG ugga to 
   fear] 1: FRIGHTFUL, DIRE  2a: offensive to the sight : HIDEOUS  2b: 
   offensive or unpleasing to any sense  3: morally offensive or objectionable 
   : REPULSIVE  4a: likely to cause inconvenience or discomfort : TROUBLESOME  
   4b: THREATENING  4c: SURLY, QUARRELSOME