KJV - 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.
ASV - 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.
BBE - Being conscious that you have done no wrong; so that those who say evil things about your good way of life as Christians may be put to shame.
WEB - having a good conscience; that, while you are spoken against as evildoers, they may be disappointed who curse your good manner of life in Christ.
YLT - 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;