Trailer Trucking Festival 2013

The word "truck" might have come from a back-formation of "truckle" with the meaning "small wheel", "pulley", from Middle English trokell, in turn from Latin trochlea. Another explanation is that it comes from Latin trochus with the meaning of "iron hoop". In turn, both go back to Greek trokhos (τροχός) meaning "wheel" from trekhein (τρέχειν, "to run"). The first known usage of "truck" was in 1611 when it referred to the small strong wheels on ships' cannon carriages. In its extended usage it came to refer to carts for carrying heavy loads, a meaning known since 1771. With the meaning of "motor-powered load carrier", it has been in usage since 1930, shortened from "motor truck", which dates back to 1916.
"Lorry" has a more uncertain origin, but probably has its roots in the railway industry, where the word is known to have been used in 1838 to refer to a type of truck (a freight car as in British usage, not a bogie as in the American), specifically a large flat wagon. It probably derives from the verb lurry (to pull, tug) of uncertain origin. With the meaning of "self-propelled vehicle for carrying goods" it has been in usage since 1911.
Before that, the word "lorry" was used for a sort of big horse-drawn goods wagon.