幸福

1. Origins, structure, and basic meaning

• Structure: 幸福 (こうふく) means happiness or a fortunate state in life. Both examples treat it as emotional content with different experiencers.
• Basic usage: A speaker feels simple happiness at a family table and rejoices in another person's happiness as their own.

2. Common pitfalls and similar expressions

• Happiness personally felt and another person's happiness celebrated
  • The first 幸福を is the speaker's experience; the second belongs to someone else. Distinguish the person possessing happiness from the person reacting to it.