Berean Study Bible
keeping a clear conscience, so that those who slander you may be put to shame by your good behavior in Christ.

King James Bible
Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.

American Standard Version
having a good conscience; that, wherein ye are spoken against, they may be put to shame who revile your good manner of life in Christ.

Darby Bible Translation
having a good conscience, that [as to that] in which they speak against you as evildoers, they may be ashamed who calumniate your good conversation in Christ.

Douay-Rheims Bible
But with modesty and fear, having a good conscience: that whereas they speak evil of you, they may be ashamed who falsely accuse your good conversation in Christ.

English Revised Version
having a good conscience; that, wherein ye are spoken against, they may be put to shame who revile your good manner of life in Christ.

Young's Literal Translation
having a good conscience, that in that in which they speak against you as evil-doers, they may be ashamed who are traducing your good behaviour in Christ;