プログレッシブ和英中辞典(第4版)の解説
いわう【祝う】
〔人を〕congratulate ((a person on a thing))；〔事柄を〕celebrate
誕生日を祝って
in celebration of a person's birthday
ひな祭を祝う
celebrate [observe] the Dolls' Festival
写真コンクール一等賞のご受賞を心からお祝い申し上げます
I 「heartily congratulate you on [offer my hearty congratulations on your] winning first prize in the photo contest.
ご結婚をお祝い申し上げます
I congratulate you on your marriage.
昨年学校の創立50周年を祝った
Last year the school celebrated the fiftieth anniversary of its founding.
君の門出を祝って乾杯だ
Let's drink (a toast) to your new life.