shortwave

The term "shortwave" is a modern compound, formed in the early 20th century from two native English elements. "Short," tracing back to Proto-Germanic skurtaz, describes a deficiency in linear extent. "Wave," from Proto-Germanic wag-, conveys the sense of motion or undulation. In the context of radio, these literal meanings were combined to classify electromagnetic radiation based on its wavelength relative to the longer waves used in early radio broadcasts. Thus, "shortwave" logically denotes radio waves of comparatively shorter length, which possess the property of being reflected by the ionosphere, enabling long-distance communication.

Structure: short (limited in length) + wave (oscillation) - short: From Old English sceort, of Germanic origin, meaning "not long" or "deficient in length." Functions as an adjective modifying the noun. - wave: From Old English wafian (to wave with the hands) and wæg (motion, wave), of Germanic origin. Functions as a noun denoting a periodic disturbance.