Maybe you have forgotten that the control of the tongue is the greatest mark of spiritual maturity while the destructive aspect of it is its misuse. You must not let any unwholesome word come out of your mouth no matter how ugly the situation may be, instead say that which is beneficial for the building up of those around that it may give grace to those who hear.
Before you utter a word let alone a sentence, ask yourself these three questions:
Is it true?
Is it kind?
Is it necessary?
“A slip of the foot you may soon recover but a slip of the tongue you may never get over” BENJAMIN FRANKLIN
Finally, think of a situation you remember that have misused your tongue, make restitution for this if possible. God is our strength