(Internet slang) dirty room

at-home clothes

necessary evil

a vacuum cleaner

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

necessity (quality or state of being necessary, unavoidable, or absolutely requisite)

cleaning woman; cleaning lady; charwoman

room rent

general cleaning (especially one at the end of the year)

clean generally, houseclean