夢

1. Origins, structure, and basic meaning

• Structure: 夢 (ゆめ) can mean imagery experienced in sleep or an aspiration for the future.
• Basic usage: A sleeper experiences flying through the sky; elsewhere, a person refuses to abandon the goal of becoming a doctor.

2. Common pitfalls and similar expressions

• Image experienced during sleep and ambition pursued for the future
  • 夢を見る is a sleep experience, while 夢を諦めない concerns maintaining a long-term goal. The latter is not a literal sleeping vision.