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Adjective: beastly (beastlier,beastliest)  beest-lee
  1. [informal] Very unpleasant
    "beastly weather";
    - hellish [informal], god-awful [informal], horrible [informal], hellacious [N. Amer, informal]
  2. Resembling a beast; showing lack of human sensibility
    "beastly desires";
    - bestial, brute, brutish, brutal
Adverb: beastly  beest-lee
  1. In a beastly manner
    "she behaved beastly toward her mother-in-law"

Derived forms: beastlier, beastliest

See also: inhumane, unpleasant

Encyclopedia: Beastly