NO BUTS ABOUT IT : Phrase that means without a doubt or reservation. Denotes that there are no options left for arguing further, or for disagreeing. It is a finished thing. Indicates CERTAINTY.

TETELESTA : “IT IS FINISHED” (John 19:30) Strong’s Greek 5055: “I end, I finish, I fulfill, I accomplish, I pay.”
From telos; to end, i.e. complete, execute, conclude, discharge. Also translated “PAID IN FULL!” THREE words in English, ONE word in Greek – TETELESTAI! One word, but no word ever uttered has so changed the history and destiny of mankind. In Latin tetelestai is rendered with two words “Consummatum est” (It is consummated!) Jesus spoke 7 times on the Cross (Lk 23:34+; Jn 19:36+; Lk 23:42+; Mt 27:46; Jn 19:28,30+, Lk 23:46+). TETELESTAI was Jesus’ next to last word and was followed by “Father, INTO THY HANDS I COMMIT MY SPIRIT.” (Lk 23:46+). “IT IS FINISHED!” “Yes, indeed/ Finished, ev’ry jot/ Sinner, this is all you need/Tell me, is it not?” (Ira Sankey)
As C H Spurgeon says TETELESTAI conveys:
“Christ has paid the debt which all the torments of eternity could not have paid. Once again—when He said, “IT IS FINISHED,” Jesus had TOTALLY DESTROYED THE POWER OF SATAN, of sin and of death. The Champion accepted the challenge to do battle for our soul’s redemption against all our foes.
“An ocean of meaning in a drop of language, a mere drop. It would need all the other words that ever were spoken, or ever can be spoken, to explain this one word. It is altogether immeasurable. It is high; I cannot attain to it. It is deep; I cannot fathom it. IT IS FINISHED is the most charming note in all of Calvary’s music. The fire has passed upon the Lamb. He has borne the whole of the wrath that was due to His people. This is the royal dish of the feast of love.”

“Can a woman forget her nursing child, or lack compassion for the son of her womb?  Even if she could forget, I will not forget you!  Behold, I have inscribed you on the palms of My hands; your walls are ever before Me,”   Isaiah 49:15:16.

“For the writing which is written in the king’s name, and sealed with the king’s ring, may no man reverse,”   Esther 8:8.

“Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to His cross; and having DISARMED principalities and powers, He made a show of them openly, triumphing over them in it,”   Colossians 2:14-15.

“There remains therefore a rest to the people of God. For he that is entered into his rest, he also hath ceased from his own works, as God did from His. Let us labor therefore to enter into that rest, lest any man fall after the same example of unbelief,”   Hebrews 4:9-11.

“Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need,”   Hebrews 4:16.

“Do not exploit the poor because they are poor and do not crush the needy in court, for the Lord will take up their case and will exact life for life,”   Proverbs 22:22-23.

“The LORD is with me like a dread champion; Therefore my persecutors will stumble and not prevail. They will be utterly ashamed, because they have failed, With an everlasting disgrace that will not be forgotten.”   Jeremiah 20:11.

“Who will bring any charge against God’s elect? It is God who justifies. Who is there to condemn us? For Christ Jesus, who died, and more than that was raised to life, is at the right hand of God — and He is interceding for us,”    Romans 8:33-34.