1. സന്തോഷം (santhosham): This is the most common and general word for "happy".
2. സന്തോഷവാന് (santhoshavan): This means "happy" as an adjective, describing someone who is happy.
3. സന്തോഷിതന് (santhositthan): This also means "happy" as an adjective, but is slightly more formal.
4. സന്തോഷപ്പെടുക (santhoshappeduka): This means "to be happy", "to feel happy", or "to be joyful".
5. സന്തോഷം നേരുക (santhosham neruka): This literally means "to wish happiness", but it's a common expression used for saying "happy birthday" or "congratulations".
The best translation will depend on the specific situation and what you are trying to convey.