恋旧 (liàn jiù) literally combines 恋 (liàn), meaning 'to be attached to' or 'to yearn for', and 旧 (jiù), meaning 'old' or 'past'. Together, they describe a sentimental attachment to things, people, or experiences from the past — not merely remembering them, but feeling emotionally drawn to them. It often carries a gentle, wistful tone, suggesting warmth and fondness rather than regret or resistance to change.

This word is commonly used to describe people’s attitudes toward childhood objects, outdated technology (like film cameras), old songs, or former relationships. It appears frequently in literature, music lyrics, and everyday conversation when reflecting on personal history. While it can occasionally imply reluctance to embrace the new, it’s usually neutral or even positive — highlighting emotional depth and continuity of identity across time.