"beastlier" in the adjective sense
1. beastly, hellish, god-awful
informal) very unpleasant
"hellish weather"
"stop that god-awful racket"
2. beastly, bestial, brute, brutish, brutal
resembling a beast showing lack of human sensibility
"beastly desires"
"a bestial nature"
"brute force"
"a dull and brutish man"
"bestial treatment of prisoners"
Source: WordNet® (An amazing lexical database of English)
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