ἀντέπω G471
antépō · an-tep'-o · Verb
from ἀντί and ἔπω; to refute or deny:--gainsay, say against.
3 Occurrences in the King James Bible
Luke 21:15For I will give you a mouth and wisdom, which all your adversaries shall not be able to gainsay nor resist.
Acts 4:14And beholding the man which was healed standing with them, they could say nothing against it.
Acts 4:14And beholding the man which was healed standing with them, they could say nothing against it.