The general meaning is: It is dangerous to plunge into litigation. At all times, there is the risk of failure, and, if we fail, of being at the mercy of an irritated adversary. Without the italics, the clause may be rendered, “lest thou do something (i. e., something humiliating and vexatious) at the end thereof.”
Related Commentaries of Proverbs 25:8
Proverbs 25:8
8 Go not forth hastily to strive, lest thou know not what to do in the end thereof, when thy neighbour hath put thee to shame.