哀歌: the Book of Lamentations / a female given name / 愛下, 愛禾, 愛華, 愛賀, 会賀, 合賀: a surname / 秋賀, 秋鹿, 秋廉, 相可, 相賀, 藍賀: a surname

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).

世界平和: world peace

快人: a male given name / 快斗: a male given name / 怪斗: a male given name / 海人: a male given name / 海斗: a male given name