The treatment of the prisoners was positively 'barbaric'.
They considered the custom 'barbaric'.
His table manners are 'barbaric'.
(..) Bloody hell! That's an Ukrainian Ironbelly. Here. It's been trained to expect pain when it hears the noise. That's barbaric! Blimey! You seem you're gonna try that one to get over here? No kind of magic would work in here. It's in here, Harry? (..)2011 Harry Potter and the Deathly Hallows: Part 2