What is the meaning of evil-doer a kenning word

Kenings are when you use two or more words to describe objects that could be described with a single word, however, this is more poetic. It was pretty common in the old times, around the 10th century. Evil-doer is a kenning that means villain or baddie. Any type of an antagonist can be often described as an evil-doer, because it sometimes fits your verse or sounds more poetic than just saying villain.