G4914–συνήθεια–sunētheia

But you have a custom, that I should release someone to you at the Passover. Therefore do you want me to release to you the King of the Jews?"

συνήθεια sunētheia “a custom”

However, that knowledge isn't in all men. But some, with consciousness of the idol until now, eat as of a thing sacrificed to an idol, and their conscience, being weak, is defiled.

συνηθείᾳ sunētheia “by custom”

But if any man seems to be contentious, we have no such custom, neither do God's assemblies.

συνήθειαν sunētheian “custom”