青年

1. Origins, structure, and basic meaning

• Structure: The relatively formal person noun 青年 (せいねん) denotes a young man in youth or early adulthood.
• Basic usage: It can introduce 一人の青年 or refer to the young male protagonist of a story.

2. Common pitfalls and similar expressions

• A young adult man
  • The word alone does not fix an exact age, but it is a more formal term closer to young adulthood than boyhood.