c.1300, "to trip up, overthrow, defeat, dispossess," from O.Fr.
supplanter "to trip up, overthrow," from L.
supplantare "trip up, overthrow," from
sub "under" +
planta "sole of the foot" (see
plant (n.)). Meaning "replace one thing with another" first recorded 1671. Interesting sense evolution parallel in Heb.
akabh "he beguiled," from
akebh "heel."