I’m reading If This is a Man and I found this quote: 

“When one works, one suffers and there is no time to think: our homes are less than a memory…The wooden hut, crammed with suffering humanity, is full of words, memories and of another pain. “Heimweh” the Germans call this pain; it is a beautiful word, it means “longing for one’s home.”

- Primo Levi, If This is a Man

Heim is literally “home,” Weh is literally “pain.”