unearned (adj.)

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" (source also of 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.

prefix of negation, Old English un-, from Proto-Germanic *un- (source also of Old Saxon, Old Frisian, Old High German, German un-, Gothic un-, Dutch on-), from PIE *n- (source of Sanskrit a-, an- "not," Greek a-, an-, Old Irish an-, Latin in-), combining form of PIE root *ne- "not." Often euphemistic (such as untruth for "lie").

The most prolific of English prefixes, freely and widely used in Old English, where it forms more than 1,000 compounds. It underwent a mass extinction in early Middle English, but emerged with renewed vigor 16c. to form compounds with native and imported words. It disputes with Latin-derived cognate in- (1) the right to form the negation of certain words (indigestable/undigestable, etc.), and though both might be deployed in cooperation to indicate shades of meaning (unfamous/infamous), typically they are not.

It also makes words from phrases (such as uncalled-for, c. 1600; undreamed-of, 1630s; uncome-at-able, 1690s; unputdownable, 1947, of a book; un-in-one-breath-utterable, Ben Jonson; etc., but the habit is not restricted to un-; such as put-up-able-with, 1812). As a prefix in telegramese to replace not and save the cost of a word, it is attested by 1936.