What is the prefix for truck?

There isn't a single, universally accepted prefix for "truck." However, depending on the context, you could use:

* Semi- for semi-trailer trucks.

* Pick-up for pick-up trucks.

* Dump for dump trucks.

* Delivery for delivery trucks.

* Box for box trucks.

* Flatbed for flatbed trucks.

It's important to choose a prefix that accurately reflects the specific type of truck you're referring to.