IPA: /ˈwɛtli/
KK: /ˈwɛtli/
In a manner that is wet or damp.
The ground was wetly covered with rain after the storm.
Wetly → It is formed from "wet" (from Old English *wæt*, meaning moist or damp) and "-ly" (meaning in a manner of). The word "wetly" means in a manner that is moist or damp.
Think of being 'moist' ('wet') and how the '-ly' suffix indicates the manner of being. So, wetly means doing something in a moist way.