What is the Indian word for tea?

There is actually no such language as "Indian". There are more than 450 different languages spoken in India. If you are talking about Native American languages, there are more than 700.

If you would like a translation, you would need to specify which Indian language you are talking about.

The universal Word meant and understood for tea in India is "Chai"

Other derivatives come for this Word: Cha, Chia, Chaa etc.