John Chrysostom

See how everything here is intensitive. For he says, "being filled," and "with all," and having named maliciousness in general, he also further pursues the particulars, and these too in excess, saying, "Full of envy, murder," for the latter of these comes from the former, as was shown in Abel's case and Joseph's...

Homily on Romans 5 ↗

Theophylact of Ohrid

Notice how he intensifies the speech; he calls them filled, and moreover with "all" unrighteousness, that is, having reached the utmost degree of every vice. Then he enumerates the kinds of vice as well. By the name "fornication" he denotes every kind of impurity in general. "Wickedness" is treachery against one's neighbor. "Covetousness" is the desire for possessions. "Malice" is vindictiveness. Murder always comes from envy. Thus Abel was killed out of envy. And Joseph too they wanted to kill out of envy. …

Commentary on Romans ↗

Thomas Aquinas

Then when he says being filled, he enumerates these unbecoming actions. First, he describes their general state, saying being filled with all iniquity, because, as it is said: all sin is wickedness (1 John 3:4). For just as every virtue, inasmuch as it carries out a precept of the law, qualifies as justice, so every sin, inasmuch as it is at variance with the rule of the divine law, qualifies as wickedness. And so sins are particularly reprehended in the Sacred Scripture. …

Commentary on Romans ↗