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

fourth (4th), number four

the ninth

(music, colloquial) Clipping of 交響曲第九番ニ短調 (Kōkyōkyoku Daikuban Ni-tanchō): Beethoven’s Ninth Symphony in D minor