回復 / かいふく [kaifuku] or 'restoration' in Japanese. While this page deals with the ability, the ability itself refers to the materia of the same name.
Pictlogica

Restore
Type: White Magic, Rarity: ★★★, Charge: 30-41
Target: single, Strength: 5, Max Level: 12, Element: Holy
Buy: - (sell: ? gil)
Obtain: event quest One-winged Angel
Description: White Magic that heals wounds with a holy light. Restores a small amount of HP

Restore★
Type: White Magic, Rarity: ★★★★, Charge: 44-61
Target: single, Strength: 40, Max Level: 18, Element: Holy
Buy: - (sell: ? gil)
Obtain: event quest One-winged Angel
Description: White Magic that heals wounds with a holy light. Restores a moderate amount of HP
Category: Ability