Wiktionary
demonish
a. Like or characterisic of a demon; demonic.
Usage examples of "demonish".
He glances over his shoulder to see that the last of his forces are clear of the demonish pikes and ready for the assault on the remaining angels.
Three of the dogs were gone and it was likely the devil-spawn women had taken them for demonish reasons of their own.
Evidently the devil's country rams hadn’t caught any demonish diseases, because they got the job done.