This speaks of a joyful heart as being good medicine because it makes a person feel better. Alternate translation: "A joyful heart is like medicine that makes a person feel better" (See: [[rc://en/ta/man/jit/figs-metaphor]])
The "heart" represents a person's feelings, attitudes and motivations. Alternate translation: "Being joyful" (See: [[rc://en/ta/man/jit/figs-metonymy]])
Here the "spirit" represents a person's feelings and emotional state. A broken spirit refers to a poor emotional state. Alternate translation: "depression" (See: [[rc://en/ta/man/jit/figs-metonymy]])
A person's bones represent their physical health and strength. If a person's bones dry up it means that they are very sick and unhealthy. Alternate translation: "makes a person unhealthy and weak" (See: [[rc://en/ta/man/jit/figs-metonymy]])