道喜的英文：
congratulate sb. on a happy occasion

参考例句：

"I congratulate you." Morcerf smiled
“真的！那么我向您道喜了。”

Catherine wished to congratulate him, but knew not what to say, and her eloquence was only in her eyes.
凯瑟琳本想向他道喜，可是不知说啥是好，满肚子的话全含在眼神里。

congratulate是什么意思：
v. 祝贺，贺喜

Receive insults,thanks,congratulations
受到侮辱、感谢、祝贺

Warm applause,congratulations,thanks
热诚的掌声、祝贺、感谢

A subject for pity,ridicule, congratulation
怜悯、取笑、祝贺的对象

happy是什么意思：
adj. 高兴的；使人高兴的；情愿的；放心的；幸运的；恰当的

Health is happiness
健康就是幸福

Content is happiness
知足常乐

Then Zara was happy.
然后扎拉就高兴起来了。

occasion是什么意思：
n. 场合，盛典；时机
v. 引起，惹起

Well, it's a big occasion.
嗯，这个场面很宏大。

On this occasion the lodge sent a carriage.
为了当晚的演出，支部派了马车来接她。

A solemn occasion; ceremonial garb.
庄重的场合；正式的服装。