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."
