Oh, indeed, one wicked, wrathful soul, his tongue's a ruddy hue.

This couplet vividly describes the anger of a 'bad' or wicked person. It highlights the 'reddish color of their tongue,' symbolizing the intense and often destructive nature of their rage. Just as a tongue can speak harsh words, its reddened appearance here suggests the fiery passion of their fury, perhaps even hinting at the physical manifestation of their uncontrolled temper. It's a powerful image conveying how inner wickedness and anger can become visibly apparent, often through their words and expressions.