New Revised Standard Version
We have renounced the shameful things that one hides; we refuse to practice cunning or to falsify God’s word; but by the open statement of the truth we commend ourselves to the conscience of everyone in the sight of God.

Contemporary English Version
We don't do shameful things that must be kept secret. And we don't try to fool anyone or twist God's message around. God is our witness that we speak only the truth, so others will be sure we can be trusted.

New American Bible
Rather, we have renounced shameful, hidden things; not acting deceitfully or falsifying the word of God, but by the open declaration of the truth we commend ourselves to everyone’s conscience in the sight of God.

Douay-Rheims Bible
But we renounce the hidden things of dishonesty, not walking in craftiness nor adulterating the word of God: but by manifestation of the truth commending ourselves to every man's conscience, in the sight of God.

But we renounce the hidden things of dishonesty, not walking in craftiness nor adulterating the word of God: but by manifestation of the truth commending ourselves to every man's conscience, in the sight of God.

renounced.

1 Corinthians 4:5 Therefore, judge not before the time: until the Lord come, who both will bring to light the hidden things of darkness and will make manifest the counsels of the hearts. And then shall every man have praise from God.

dishonesty.

Romans 1:16 For I am not ashamed of the gospel. For it is the power of God unto salvation to every one that believeth: to the Jew first and to the Greek.

Romans 6:21 What fruit therefore had you then in those things of which you are now ashamed? For the end of them is death.

Ephesians 5:12 For the things that are done by them in secret, it is a shame even to speak of.

not.

2 Corinthians 1:12 For our glory is this: the testimony of our conscience, that in simplicity of heart and sincerity of God, and not in carnal wisdom, but in the grace of God, we have conversed in this world: and more abundantly towards you.

2 Corinthians 2:17 For we are not as many, adulterating the word of God: but with sincerity: but as from God, before God, in Christ we speak.

2 Corinthians 11:3,6,13-15 But I fear lest, as the serpent seduced Eve by his subtilty, so your minds should be corrupted and fall from the simplicity that is in Christ. . . .

Ephesians 4:14 That henceforth we be no more children tossed to and fro and carried about with every wind of doctrine, by the wickedness of men, by cunning craftiness by which they lie in wait to deceive.

1 Thessalonians 2:3-5 For our exhortation was not of error, nor of uncleanness, nor in deceit. . . .

by.

2 Corinthians 5:11 Knowing therefore the fear of the Lord, we use persuasion to men: but to God we are manifest. And I trust also that in your consciences we are manifest.

2 Corinthians 6:4-7 But in all things let us exhibit ourselves as the ministers of God, in much patience, in tribulation, in necessities, in distresses, . . .

2 Corinthians 7:14 And if I have boasted any thing to him of you, I have not been put to shame: but as we have spoken all things to you in truth, so also our boasting that was made to Titus is found a truth.