en_tn/pro/15/13.md

A joyful heart makes the face cheerful

Here the word "heart" represents the person. Alternate translation: "When a person is joyful, his face is cheerful" (See: rc://en/ta/man/translate/figs-synecdoche)

crushes the spirit

The writer speaks of a person being discouraged as if that person's spirit were an object that is crushed. See how you translated this in Proverbs 15:4. Alternate translation: "makes a person discouraged" (See: rc://en/ta/man/translate/figs-metaphor)