unearth (v.)youdaoicibaDictYouDict[unearth 词源字典]
"to dig up," mid-15c., from un- (2) "opposite of" + earth (v.) "bury (a corpse) in the ground" (c. 1400, from earth (n.)). Related: Unearthed; unearthing.[unearth etymology, unearth origin, 英语词源]