bestial
1. [ adjective ] resembling a beast; showing lack of human sensibility
Synonyms: brute brutish beastly
Examples:

"beastly desires" "a bestial nature" "brute force" "a dull and brutish man" "bestial treatment of prisoners"

Related terms: inhumane
Similar spelling:   bestially
  bestialize
  bestiality
  bestialise
  bestowal
  beastly