IPA: /ˈswɛtɪli/
KK: /ˈswɛtɪli/
In a manner that involves sweating or is characterized by sweat.
After running for an hour, he arrived at the finish line sweatily, dripping with perspiration.
Sweatily is formed from "sweat" (from Old English *swæt*, meaning moisture or perspiration) and "-ily" (a suffix meaning in a manner). The word "sweatily" describes something done in a manner that involves sweating or perspiration.
Think of the Old English word for moisture, 'swæt', to remember that 'sweatily' means something done in a way that involves sweating.