return · restore

1. Origins, structure, and basic meaning

• Structure: 復 has 12 strokes and the on-reading ふく. Its sense of returning or restoring appears in 回復 (かいふく) and 復習 (ふくしゅう).
• Basic usage: 回復 means recovery of something such as physical strength or sales; 復習 means reviewing material already learned.

2. Common pitfalls and similar expressions

• Recovery and review
  • 体力が少しずつ回復した means that physical strength gradually recovered. 売り上げはゆっくり回復している likewise describes sales slowly improving again.
  • 習った文法を家でもう一度復習した means reviewed previously learned grammar again at home. 間違えた問題だけを復習しよう suggests reviewing only the questions answered incorrectly.