earn (v.) Look up earn at Dictionary.com
Old English earnian "deserve, earn, merit, win, get a reward for labor," from Proto-Germanic *aznojan (source also of Old Frisian esna "reward, pay"), from *azna "labor" especially "field labor" (source of Old Norse önn "work in the field"), from PIE *aznon "to do harvest work, serve" (source of Old High German arnon "to reap"), denominative verb from *es-en- "harvest, fall" (cognates: Old High German aren "harvest, crop," German Ernte "harvest," Old English ern "harvest," Gothic asans "harvest, summer," Old Church Slavonic jeseni, Russian osen, Old Prussian assanis "autumn"). Also from the same root are Gothic asneis, Old High German esni "hired laborer, day laborer," Old English esne "serf, laborer, man." Related: Earned; earning.