Formal:
* มีความสุข (mee kwahm sook) - This is the most common and formal way to say "are happy." It literally translates to "have happiness."
* ดีใจ (dee jai) - This is another formal option, meaning "happy" or "delighted."
Informal:
* สบายใจ (sa-bai jai) - This means "feel comfortable" or "at ease" and can be used to express happiness in a relaxed way.
* สนุก (sa-nook) - This means "fun" or "enjoying oneself" and is a more casual way to say "happy."
Example Sentences:
* ฉันมีความสุขมาก (chan mee kwahm sook mahk) - I am very happy.
* เขาดีใจที่ได้เจอคุณ (kao dee jai thi dai jer koun) - He is happy to see you.
* ฉันสบายใจมาก (chan sa-bai jai mahk) - I am very comfortable/at ease.
* พวกเรามีความสนุกมาก (puao rao mee kwahm sa-nook mahk) - We are having a lot of fun.
It's important to choose the appropriate expression based on the situation and the people you are talking to.