What is the meaning of Romans 12:20?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

On the contrary, “If your enemy is hungry, feed him; if he is thirsty, give him a drink. For in so doing, you will heap burning coals on his head.”

Berean Standard Bible (BSB)

Therefore “If your enemy is hungry, feed him. If he is thirsty, give him a drink; for in doing so, you will heap coals of fire on his head.”

World English Bible (WEB)

Therefore{G3767} if{G1437} thine{G4675} enemy{G2190} hunger{G3983}{(G5725)}, feed{G5595}{(G5720)} him{G846}; if{G1437} he thirst{G1372}{(G5725)}, give{G4222} him{G846} drink{G4222}{(G5720)}: for{G1063} in so{G5124} doing{G4160}{(G5723)} thou shalt heap{G4987}{(G5692)} coals{G440} of fire{G4442} on{G1909} his{G846} head{G2776}.

Strong's King James

"BUT RATHER IF YOUR ENEMY IS HUNGRY, FEED THEM AND IF THIRSTY, GIVE THEM A DRINK, FOR DOING THIS, YOU WILL HEAP UP BURNING COALS UPON THEIR HEAD."

The F.O.G*

[20] Instead, if your enemy is hungry, provide food. If they're thirsty, give something to drink. Your unexpected kindness will be like heaping burning coals on their head.

The F.O.G Paraphrase

I will recompense again, saith the Lord;’ if, then, thine enemy doth hunger, feed him; if he doth thirst, give him drink; for this doing, coals of fire thou shalt heap upon his head;

Young's Literal Translation