回復

1. Origins, structure, and basic meaning

• Structure: 回復 (かいふく) is a noun and suru-verb for returning from a weakened or worsened state toward a prior level.
• Basic usage: It applies to health and strength as well as abstract conditions such as sales, the economy, or trust.
  • 休養を取り、体力が少しずつ回復した。 — After resting, my strength gradually recovered.
  • 店の売り上げはゆっくり回復している。 — The store's sales are slowly recovering.

2. Common pitfalls and similar expressions

• Recovering and restoring
  • Mark the condition that recovers with が, as in 体力が回復する. A restored object can take を, as in 信頼を回復する.