Wherefore - The oldest manuscripts omit “Wherefore.”
if ye be dead - Greek, “if ye died (so as to be freed) from,” etc. (compare Rom 6:2; Rom 7:2, Rom 7:3; Gal 2:19).
rudiments of the world - (Col 2:8). Carnal, outward, worldly, legal ordinances.
as though living - as though you were not dead to the world like your crucified Lord, into whose death ye were buried (Gal 6:14; 1Pe 4:1, 1Pe 4:2).
are ye subject to ordinances - By do ye submit to be made subject to ordinances? Referring to Col 2:14 : you are again being made subject to “ordinances,” the “handwriting” of which had been “blotted out” (Col 2:14).