严 (yán): แน่น

Teacher Yan has been teaching us history for five years, and his classes are always very interesting.

My good friend is named Yan Ming. He runs especially fast and is the captain of the school track and field team.

Manager Yan, this contract needs your signature. The client is still waiting in the meeting room.

My older sister married a doctor whose surname is Yan, and now their family lives in Beijing.