congratulate       
verb [ T ] uk/kənˈɡrætʃ.ə.leɪt/ us/kənˈɡrætʃ.ə.leɪt/
B2 祝贺;庆贺;恭喜
to praise someone and say that you approve of or are pleased about a special or unusual achievement
  I was just congratulating Ceri on winning/on having won her race. 我那时正在祝贺凯里赛跑获胜。 
 - More examples
 - The defeated candidate gave a dignified speech in which he congratulated his rival.
 - His plan was such a success that even his original critics had to congratulate him.
 - Granny rang up to congratulate him on passing his exams.
 - I must congratulate you - this is a very impressive piece of work.
 - It is my wife you should be congratulating - she did all the hard work.