合鍵: duplicate key, master key

純愛: pure love

愛息: one's son

最愛: beloved, emotionally close, dear

最愛: to be beloved, to be close, to be dear

度合い, 度合: degree

合い言葉: password; watchword; countersign

合口, 合い口: compatibility, rapport, or cooperativeness in anything done together with others / 合口, 合い口: getting along well with others, affinity

相嫁: co-sister-in-law; one's husband's brother's wife

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)