An acute feeling of homesickness is?

Answer 1

Nostalgia is one emotion felt when you are homesick; loneliness is another.

Acute feelings of homesickness can be described partly by using terms such as depression, longing for or badly missing one's home, badly missing the companionship of one's family or community.

Answer 2

You could use the word "nostalgia," but that doesn't really have the idea of "acute," and it could just be a general feeling that you miss the past, not necessarily home. To convey the idea of being extra homesick, you would add an adverb intensifier like "very" or "incredibly" or "overwhelmingly." You could also explain it more, as in "She was so homesick, she thought she might die of it."

In German, an acute feeling of being homesick would be Heimweh.