The term "wily" is an adjective that describes someone who is clever, cunning and sly in their actions. This person has a sharp mind and uses their intelligence to outsmart others or achieve their goals in a deceptive manner. They are often able to anticipate the moves of others and use this knowledge to gain advantage over them. In short, being "wily" means having a clever and cunning nature that allows you to navigate through challenges with guile and resourcefulness.