(idiomatic, especially a child) to be on the verge of tears

person who studies for the annual university entrance exams at home instead of at a 予備校 (yobikō)

standing by at home (e.g. to prevent the spread of illness) / being on furlough; being temporarily laid off

(slang) reclusiveness: NEETdom, etc.

(slang) recluse: NEET, hikikomori, etc.