• 旧姓きゅうせい — former surname
• 旧友きゅうゆう — old friend
• 旧式きゅうしき — old style
• 旧館きゅうかん — old building
• 旧家きゅうか — old family (lineage)
• 旧正月きゅうしょうがつ — Lunar New Year

More examples ▼

The character 旧 is a combination of 日ひ (sun, day) and a phonetic element representing a container or boundary. It originally referred to something from the past or something that is no longer in active use. The concept of “former” or “long ago” is key.