Formal:
* Namaste: This is the most formal greeting and translates to "I bow to you."
* Shubh prabhat: This translates to "Good morning."
* Shubh ratri: This translates to "Good evening."
* Shubh sandhya: This translates to "Good afternoon."
Informal:
* Kem chho? This is the most common way to say "hi" in Gujarati. It translates to "How are you?"
* Kya kare chho? This is a slightly more informal way to say "hi" and translates to "What are you doing?"
* Aapnu naam shu chhe? This translates to "What is your name?" and is often used as a way to introduce yourself.
Other options:
* Hello: This is an English word that is widely understood in Gujarati.
* Sup: This is a slang term that is used by younger people.
The best way to say "hi" in Gujarati depends on the situation and the person you are talking to. If you are unsure, it is always best to err on the side of formality.