The compound "windblown" is a transparent formation from two ancient Germanic roots. "Wind" traces back to a Proto-Indo-European root meaning "blowing," which evolved into terms for moving air across Germanic languages. "Blown" originates from a separate PIE root meaning "to blow" or "inflate," giving rise to the verb describing the action of air movement. The fusion of these elements in English creates a descriptive adjective that literally means "blown by the wind." This logical construction directly links the natural force (wind) with its observable effect (the state of being blown) to describe displaced sand, sculpted trees, or disheveled hair.

Structure: wind (air in motion) + blown (past participle of blow) - wind: Old English origin, from Proto-Germanic windaz, from Proto-Indo-European h₂wéh₁n̥ts ("blowing"). Functional role: Noun used attributively to modify the participle. - blown: Old English origin, past participle of blāwan ("to blow"), from Proto-Germanic blēaną, from Proto-Indo-European bʰleh₁- ("to blow, swell"). Functional role: Participle indicating the action or state of being affected by the wind.