No Unwholesome Talk - Ephesians 4:29-32

²⁹Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen. ³⁰And do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption. ³¹Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. ³²Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.

No unwholesome talk...I wonder what that means?