It's much more natural in Japanese where you can easily compound kanji to create new words.
I assume it's using 悪 so something like 悪人 (akunin, evil person), 悪神 (akujin, evil god), 悪刃 (akuha, evil blade), etc.
It's no different from using 魔 (ma, demon/witch/evil spirit) to make 魔人 (majin...