The word entreat
(in Greek, parakaleo) indicates a gentle way of speaking that is beneficial to the hearer. This is how the apostles respond to their slanderers.
The position of the apostles is summarized in two words: scum
and refuse.
The Greek word used for scum
literally refers to the useless leftovers of an animal. The word was sometimes used to describe the worst kinds of criminals. The word refuse
refers to dirt that is to be wiped off.
13 when slandered, we entreat. We have become, and are still, like the scum of the world, the refuse of all things.