προαμαρτάνωproamartánō

Same root

• πρόpró · G4253"fore", i.e. in front of, prior (figuratively, superior) to
• ἁμαρτάνωhamartánō · G264properly, to miss the mark (and so not share in the prize), i.e. (figuratively) to err, especially (morally) to sin

Where it appears

Appears 2 times in the Bible.

• 2 Corinthians 12:21 Yes, I am afraid that when I come again, God will humble me in your presence. And I will be grieved because many of you have not given up your old sins. You have not repented of your impurity, sexual immorality, and eagerness for lustful pleasure.
• 2 Corinthians 13:2 I have already warned those who had been sinning when I was there on my second visit. Now I again warn them and all others, just as I did before, that next time I will not spare them.