Definition of bestial adjective from the Oxford Advanced Learner's Dictionary

 

bestial

 adjective
adjective
BrE BrE//ˈbestiəl//
 
; NAmE NAmE//ˈbestʃəl//
 
(formal)
 
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cruel and disgusting; of or like a beast bestial acts/cruelty/noises He referred to their actions as ‘these bestial and barbaric acts’. Word Origin late Middle English: via Old French from late Latin bestialis, from Latin bestia ‘beast’.
See the Oxford Advanced American Dictionary entry: bestial