usurp (v.)Related entries & more
usurpation (n.)Related entries & more
late 14c., from Old French usurpacion, from Latin usurpationem (nominative usurpatio) "a taking into use," noun of action from past participle stem of usurpare (see usurp).
supplant (v.)Related entries & more
early 14c., "to trip up, overthrow, defeat, dispossess," from Old French suplanter, sosplanter "to trip up, overthrow, drive out, usurp," or directly from Latin supplantare "trip up, overthrow," from assimilated form of sub "under" (see sub-) + planta "sole of the foot" (see plant (n.)). Meaning "replace one thing with another" first recorded 1670s. There is a sense evolution parallel in Hebrew akabh "he beguiled," from akebh "heel."