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488 B
furious
very angry
he will show no mercy
The "he" is the neighbor whose wife has committed adultery with another man. AT: "he will not limit the pain he will cause you" or "he will hurt you as much as he can" (See: rc://en/ta/man/translate/figs-litotes)
when he takes his revenge
"in the moment of his revenge" or "when the moment arrives when he can take his revenge"
takes his revenge
If a person takes revenge, it is to cause hurt to the person who hurt him first.