DictionaryRoot: algos
Greek
algos
pain, grief
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noun
nostalgia
nuh-STAL-juh/nəˈstældʒə/
A sentimental longing for an earlier time or place.
Etymology
The pain of wanting to return home originally named severe homesickness. That longing for a distant place broadened into longing for a vanished time—the sentimental yearning for the past.