IPA: /ˈwɔːmli/
KK: /ˈwɔrmli/
In a way that shows kindness, friendliness, or affection.
She greeted her friends warmly at the party.
Warmly → It is formed from "warm" (from Old English *wearm*, meaning having a moderate degree of heat) and "-ly" (meaning in a manner of). The word "warmly" means in a manner that is warm or with warmth.
Think of being 'warm' and how adding '-ly' means doing something in that warm manner — that's why warmly means to do something with warmth.