IPA: /ˈiːvɪli/
KK: /ˈivəli/
In a way that is morally wrong or wicked.
The villain laughed evilly as he plotted his revenge.
Evilly → It is formed from "evil" (from Old English "yfel", meaning bad or wicked) and "-ly" (meaning in a manner of). The word "evilly" means in a manner that is bad or wicked.
Think of the word 'evil' to remember that 'evilly' describes doing something in a bad or wicked way.