en_tn/psa/037/012.md

The wicked man

This does not refer to a specific man. It refers to wicked people in general. Alternate translation: "The wicked person" (See: rc://en/ta/man/jit/figs-genericnoun)

the righteous

This does not refer to specific people. This refers to people who are righteous. Alternate translation: "the righteous person" (See: rc://en/ta/man/jit/figs-nominaladj)

grinds his teeth

The wicked man hates the righteous person so much that he grinds his teeth together to show his anger. (See: rc://en/ta/man/jit/writing-symlanguage)