This is the 8240th most frequent Chinese word.
happy
The Chinese word for "happy" (快乐, kuàilè) means feeling joy or contentment.
In this sentence, '快乐(happy)' is used to express a current emotional state of joy and contentment.
我很快乐，因为今天是我的生日。
I am happy because today is my birthday.
Here, '幸福(happiness)' refers to a sense of fulfillment and long-term contentment that can result from life's pursuits, beyond just momentary joy.
她的幸福来自于帮助别人。
Her happiness comes from helping others.
The word '高兴(happy)' in this context indicates excitement or pleasure about a specific achievement or event.