Understood.

sharing a room (accommodation)

mutual, together, each other / used in official or epistolary writings for elegance or politeness

mutual, together, each other, meeting

Short for 合い服 (あいふく, aifuku, “clothing worn in spring or autumn”).

(informal) Clipping of はい.

(literary or dialectal) interval of time or space; time; during; between; leisure / relation; relationship; terms (between people) / Short for 間狂言 (aikyōgen). / Short for 間駒 (aigoma).

隻: boats / 石: (slang) transistors

堰: weir, embankment / 咳: cough / 関: frontier pass, close, relation / 席: seat, mat, banquet / 積: accumulate, store up, amass / 籍: record, register, list, census / 舎: house, dwelling, dwell, reside

関: Seki (a city in Gifu Prefecture, Japan); a surname