Note: Juliana Berners ... informs us that in her time (15th century), abomynable syght of monkes was elegant English for a large company of friars. - George Perkins Marsh.
Something that is abominable is very unpleasant or bad. The President described the killings as an abominable crime + abominably abomi·nably Chloe has behaved abominably Wallis was often abominably rude. extremely unpleasant or of very bad quality = terrible