"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.
The CIA unearthed a plot to kill the President
undulation
unduly
undying
une
unearned
unearth
unearthly
uneasy
uneducated
unelectable
unemancipated