noun
A loanword from English 'homesick', used as a noun meaning the feeling of missing home.
留学して最初の一ヶ月はホームシックで大変だった。
The first month of studying abroad was tough because of homesickness.
郷愁 is a more literary or nostalgic term for longing for one's hometown, while ホームシック is a casual, everyday loanword for feeling homesick.
Loanword from English 'homesick', adapted into Japanese as a noun.