A.T. Robertson Commentary Mark 7:13

"making void the word of God by your tradition, which ye have delivered: and many such like things ye do." — Mark 7:13 (ASV)

Making void the word of God by your tradition (ακυρουντες τον λογον του θεου τη παραδοσε υμων). See on Mt 15:6 for the word ακυρουντες, invalidating, a stronger word than αθετειν, to set aside, in verse 9. See both used in Ga 3:15,17. Setting aside does invalidate.