G0208–ἀκυρόω–akuroō

There is no need for him to give honour to his father. And you have made the word of God without effect because of your teaching.

ἠκυρώσατε ēkurōsate “you made void”

Making the word of God of no effect by your rule, which you have given: and a number of other such things you do.

ἀκυροῦντες akurountes “making void”

Now this I say: The law, which came four hundred and thirty years after, does not put an end to the agreement made before by God, so as to make the undertaking without effect.

ἀκυροῖ akuroi “does annul”