What do you say truck in sanskrit?

There isn't a single perfect word for "truck" in Sanskrit. It's a modern invention and Sanskrit, being an ancient language, doesn't have a word for it.

However, you could use descriptive phrases to convey the meaning:

* वहनयान (vahanayaan): This means "vehicle for carrying" and would be the most literal translation.

* भारी वाहन (bhaari vaahan): This means "heavy vehicle."

* मालवाहक यान (maalavahak yaan): This means "vehicle for carrying goods."

Ultimately, the best way to describe a truck in Sanskrit would depend on the specific context and what you want to emphasize.