Formal:
* આભાર (Aabhaar): This is the most common and formal way to say thank you.
* ધન્યવાદ (Dhanyavaad): This is another formal way to express gratitude.
Informal:
* આભારી (Aabhari): This means "thankful" and can be used as a way of saying thank you.
* શુક્રિયા (Shukriya): This is an informal way of saying thank you, similar to "thanks".
Other ways:
* તમારા આભાર (Tamaara Aabhaar): This means "Thank you to you."
* તમારો આભાર (Tamaaro Aabhaar): This means "Thank you to you."
You can also use a phrase like "ખુબ ખુબ આભાર" (Khub Khub Aabhaar), which means "Thank you very much."
The best way to choose the right phrase depends on the situation and your relationship with the person you are thanking.