saudade

This word is well known in Italy as one of the reasons why some Brazilian football players leave Italian teams, or take breaks, to get back to their country.

Would have ended Dostoyevsky's career.

Isn't it great that one word can convey all that?

Oh, that explains that song by Love and Rockets!

"Portuguese word for a feeling of longing for something that one is fond of, which is gone, but might return in a distant future. It often carries a fatalist tone and a repressed knowledge that the object of longing might really never return."