Nostalgia

Nostalgia is a sentimentality for the past, typically for a period or place with happy personal associations. The word nostalgia is learned formation of a Greek compound, meaning “homecoming”, a Homeric word, meaning “pain” or “ache”, and was coined by a 17th-century medical student to describe the anxieties displayed by Swiss mercenaries fighting away from home. Described as a medical condition— melancholy—in the Early Modern period, it became an important trope in Romanticism.