The word 'tractor' is a modern formation built directly on the Latin root tract-, from the verb trahere meaning "to pull, draw, drag." This root is prolific in English, seen in words like attract, contract, and retract. The suffix -or, also of Latin origin, is used to form agent nouns. Thus, the literal construction "that which pulls" perfectly describes the machine's primary function. While the concept of a pulling machine is ancient, the specific term 'tractor' emerged in the late 19th century, initially for a steam-powered vehicle and later solidifying its association with the internal combustion farm vehicle that revolutionized agriculture.

Structure: tract (pull, draw) + or (agent noun suffix) tract: From Latin tractus, meaning "a drawing, pulling, dragging." In this word, it functions as the core root conveying the sense of pulling. or: A Latin-derived agent noun suffix, indicating "a person or thing that performs an action." Here, it denotes a machine that pulls.