nostalgia
noun
[ nɒˈstaldʒə ]
• a sentimental longing or wistful affection for a period in the past.
• "I was overcome with acute nostalgia for my days at university"
Origin:
late 18th century (in the sense ‘acute homesickness’): modern Latin (translating German Heimweh ‘homesickness’), from Greek nostos ‘return home’ + algos ‘pain’.
