隠者: hermit

an adult son residing with his parents; generally has not yet or can not come into family inheritance / a female servant working in a daimyō, ōoku, or other high-ranking house

room rent

at-home clothes

(Internet slang) dirty room

to retire

one's own younger sister / the wife of one's younger brother; one's sister-in-law / a younger female / (archaic, said from a male speaker) one's sister regardless of age difference

Same as いみ (imi) above

someone else's younger sister

India (the country)