beastly adj 1: very unpleasant; "hellish weather"; "stop that god-awful racket" [syn: {hellish}, {god-awful}] 2: resembling a beast; showing lack of human sensibility; "beastly desires"; "a bestial nature"; "brute force"; "a dull and brutish man"; "bestial treatment of prisoners" [syn: {bestial}, {brute(a)}, {brutish}] adv : in a beastly manner; "she behaved beastly toward her mother-in-law" [also: {beastliest}, {beastlier}] beastlier See {beastly}