What is the meaning of 2 Peter 2:22?

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

Of them the proverbs are true: “A dog returns to its vomit,” and, “A sow that is washed goes back to her wallowing in the mud.”

Berean Standard Bible (BSB)

But it has happened to them according to the true proverb, “The dog turns to his own vomit again,” and “the sow that has washed to wallowing in the mire.”

World English Bible (WEB)

But{G1161} it is happened{G4819}{(G5758)} unto them{G846} according to{G3588} the true{G227} proverb{G3942}, The dog{G2965} is turned{G1994} to{G1909} his own{G2398} vomit{G1829} again{G1994}{(G5660)}; and{G2532} the sow{G5300} that was washed{G3068}{(G5671)} to{G1519} her wallowing{G2946} in the mire{G1004}.

Strong's King James

(22) The firm truth of the Proverb has come about of them, "A DOG RETURNS UPON ITS OWN VOMIT," and "A pig washes, then rolls in the mud!"

The F.O.G*

[22] Their lives illustrate the truth of these proverbs: "A dog returns to its vomit," and "A cleaned pig goes back to wallowing in the mud."

The F.O.G Paraphrase

and happened to them hath that of the true similitude; ‘A dog did turn back upon his own vomit,’ and, ‘A sow having bathed herself—to rolling in mire.’

Young's Literal Translation