"A moral, sensible, and well-bred man / Will not ____ me, and no other can” (Cowper) (7)
I believe the answer is:
affront
(Other definitions for affront that I've seen before include "Deliberate insult or show of disrespect" , "Indignity" , "Insult openly" , "Slap in the face" , "Insult, offend" .)