For there is verily a disannulling of the commandment going before for the weakness and unprofitableness thereof.
There is, х ginetai (G1096)] - 'there takes place,' according to Psalms 110:4.
Disannulling - a repealing. Of the commandment - ordaining the Levitical priesthood. And, as the Levitical priesthood and the law are inseparable, a repealing of the law also (note, Hebrews 7:11).
Going before - the legal ordinance giving place to the Christian, the antitypical and permanent end of the former.
Weakness and unprofitableness - opposite of "power" (Hebrews 7:16).