Matthew Poole and continuators on 2 Samuel 13:22

22 And Absalom spake unto his brother Amnon neither good nor bad : for Absalom hated Amnon, because he had forced his sister Tamar.

i. e. He said nothing at all to him; to wit, about that business. It is a Synecdochical expression, used in like manner, Gen. 31. 24. He neither debated it with him, nor threatned him for it; but seemed willing to cover it, and pass it by with Brotherly kindness. For if he had wholly forborn all discourse and converse with him, it would have raised great jealousies in Amnon and David, and hindred him in his intended and desired revenge.

Or rather, but, or though, as the Hebrew Particle, Chi, commonly signifies: for the following Clause is not added as a reason of the former, but by way of exception or opposition. Though he outwardly expressed no dislike of the Fact, yet he inwardly hated him.