結婚を祝うこと
the act of celebrating a marriage
Congratulations on your wedding.
the celebration of marriage
to make one a wedding gift
ご結婚おめでとう.
I congratulate you on your marriage.
Let me congratulate you on your marriage.
I would like to extend our best wishes on your marriage.
to go through a marriage ceremony
結婚を祝う歌
Let me congratulate you on your engagement.