1. The word "胖" in English is commonly translated as "fat" for a general description.

2. If referring to a robust form of obesity, "stout" can be used.

3. For a plump and healthy weight, "plump" is an appropriate term.

4. The word "瘦" is usually translated into "thin" in English.

5. If describing someone who is very thin with bones visible, "bony" or "skinny" can be used for a more descriptive term.