込める

1. Origins, structure, and basic meaning

• Structure: 込める is read こめる and means putting something inside or putting feeling and care into something.
• Basic usage: It has an abstract use for expressing gratitude through a gift and a physical use for loading a gun in a play.

2. Common pitfalls and similar expressions

• Putting feeling into something
  • In 感謝の気持ちを込める, gratitude is expressed through a gift or action. Whereas 入れる broadly describes putting something in, 込める in this context focuses on the feeling being conveyed.