nostalgija

From Greek algos "pain, grief, distress" (see -algia) + nostos "homecoming," from neomai "to reach some place, escape, return, get home,"

Johannes Hofer (1669–1752) was a Swiss physician who named the condition, which he identified as a mania tied to homesickness in Swiss mercenary soldiers. The nost- in nostalgia means "homecoming," and such sentimental yearning for home during field operations was viewed as a disorder of the brain, with symptoms ranging from melancholy and malnutrition to brain fever and hallucinations.