精力

1. Origins, structure, and basic meaning

• Structure: 精力（せいりょく） means the physical and mental energy devoted to an activity.
• Basic usage: Use it for a lifetime of effort put into research or energy exhausted by long negotiations.

2. Common pitfalls and similar expressions

• Physical stamina and energy for activity
  • 体力 focuses on physical strength and endurance.
  • 精力 includes the mental and physical energy devoted to activities such as research or negotiations.