lustily (adv.)youdaoicibaDictYouDict[lustily 词源字典]
early 13c., lustliche, "willingly, eagerly, readily;" see lusty + -ly (2). Meaning "with pleasure, voluptuously" is c. 1300; meaning "vigorously, energetically" is c. 1400.[lustily etymology, lustily origin, 英语词源]