radio-controlled
UK[ˌreɪdiəʊ kənˈtrəʊld]US[ˌreɪdioʊ kənˈtroʊld]
adj
Operated or guided from a distance by using radio signals.
Morpheme Breakdown
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controlled
radio
radio
controlled
controlled
Etymology
The term is a modern compound adjective formed in the 20th century, directly combining two established English words. The first element, "radio," originates from the Latin radius, meaning "ray" or "spoke of a wheel," which evolved to signify the transmission and reception of electromagnetic waves. The second element, "controlled," derives from a system of medieval financial verification, its meaning generalized to mean "to exercise authoritative direction over." The compound's literal logic is transparent: an object is "controlled" (directed) via "radio" waves, capturing the core technology of remote operation without physical connection.
Analysis
Structure: radio (radio) + controlled (controlled)
- radio: From Latin radius (ray, beam). In this compound, it denotes the use of radio waves.
- controlled: From Old French contreroller, from Medieval Latin contrarotulare (to check by duplicate register). In this compound, it denotes the action of directing or commanding.
Examples
The children were fascinated by the radio-controlled airplane performing loops in the park.
Many modern military drones are sophisticated radio-controlled vehicles.
He spent the afternoon assembling and testing his new radio-controlled car.