servomotor

The word 'servomotor' is a modern technical compound, fusing two Latin-derived elements. The first part, 'servo-', originates from the Latin servus, meaning 'slave' or 'servant'. In engineering, this evolved into a concept of a component that follows commands or provides auxiliary control, as seen in 'servomechanism'. The second part, 'motor', comes from the Latin verb movere (to move), via the agent noun motor (a mover). Thus, the literal construction "servant-mover" perfectly captures the device's function: it is a motion-producing machine that acts as a subordinate, precisely executing control signals from a primary system to govern position or speed.

Structure: servo (control) + motor (machine that provides motion) - servo: From Latin servus (slave, servant). In modern technical English, it functions as a combining form meaning "providing auxiliary or controlling power." - motor: From Latin motor (mover), from movere (to move). It functions as a noun-forming element meaning "a machine that imparts motion."