en_tn/pro/13/15.md

but the way of the treacherous is never-ending

Here a person's behavior or conduct is spoken of as if it were a way or path that a person walks. A person being ruined by their own treachery is spoken of as if they are on a way or path that never ends. AT: "but the behavior of the treacherous will cause their own destruction" (See: rc://en/ta/man/translate/figs-metaphor)

the treacherous

This nominal adjective can be stated as an adjective. AT: "the treacherous person" (See: rc://en/ta/man/translate/figs-nominaladj)

a fool parades his folly

To "parade" means to display in front of everyone. AT: "a fool displays his foolishness to everyone" (See: rc://en/ta/man/translate/figs-metaphor)