What's the adjective for beastlinesses? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs beast, bestialize and bestialise which may be used as adjectives within certain contexts.
“I cannot, therefore, believe that even the body, much less the mind, can really be changed into bestial forms and lineaments by any reason, art, or power of the demons.”
“Uther died, as all mortal men must do in the end, cut down by a bestial warlord in another great battle to defend the realm he had created.”
“His denial of his own capacity for bestial thoughts is unconvincing, especially when the seeds of these thoughts wax fertile within the matrix of his imagination.”