若返る

1. Origins, structure, and basic meaning

• Structure: 若返る, read わかがえる, describes becoming younger-looking or regaining freshness and vitality.
• Basic usage: In 髪を短くしたら見た目が若返った。, the haircut makes the speaker look younger.

2. Common pitfalls and similar expressions

• Rejuvenating people and spaces
  • 見た目が若返った concerns a change in appearance, while 古い部屋が若返る metaphorically gives an old room new life. The latter describes a refreshed impression rather than the building's age.