thin

1. Origins, structure, and basic meaning

• Structure: 痩 has 12 strokes and concerns becoming thin or losing weight.
• Basic usage: 痩せる is read やせる, and 痩身 is read そうしん.

2. Common pitfalls and similar expressions

• A change and a body type
  • 少し痩せた means lost a little weight.
  • The 痩 in 痩身 is read そう.
  • 痩身の青年 means a slender young man. This expression describes his build rather than a change in weight.