earn (v.) Look up earn at Dictionary.com
Old English earnian "deserve, earn, merit, labor for, win, get a reward for labor," from Proto-Germanic *aznon "do harvest work, serve" (source also of Old Frisian esna "reward, pay"), denominative verb from *azno "labor" especially "field labor" (source of Old Norse önn "work in the field," Old High German arnon "to reap"), from PIE root *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.