Formal:
* Ndewo (n-deh-woh) - This is the most common and formal greeting, similar to "Good day" or "Hello".
Informal:
* Ezie (eh-zee-eh) - This is a more casual greeting, similar to "Hey" or "What's up".
* Kedu ka ị dị (keh-doo kah ee dee) - This literally translates to "How are you?" but is often used as a friendly greeting.
* Cheta m (cheh-tah em) - This translates to "Remember me" and is used as a friendly greeting when you haven't seen someone in a while.
The best way to say "Hi" in Igbo really depends on the situation and your relationship with the person you are greeting.