Vine's Expository Dictionary: View Entry
ὑποπόδιον hupŏpŏdiŏn, hoop-op-od'-ee-on; neuter of a compound of G5259 and G4228; something under the feet, i.e. a foot-rest (figuratively):—footstool.
The KJV translates Strong's G5286 in the following manner: footstool (with G4228) (8x), footstool (1x).
a footstool
to make one a footstool of one's feet, i.e. to subject, to reduce under one's power
metaph. taken from the practice of conquerors who placed their feet on the necks of their conquered enemies
Strong's Number G5286 matches the Greek ὑποπόδιον (hypopodion),
which occurs 9 times in 9 verses
in the TR Greek.