The word 'stormy' is a straightforward English formation, combining the native noun 'storm' with the productive adjectival suffix '-y'. The core noun 'storm' has deep Germanic roots, descending from the Proto-Germanic sturmaz, which conveyed a sense of violent commotion or roaring noise, likely imitative in origin. This literal sense of atmospheric tumult was extended metaphorically in English to describe emotional or social turbulence. Thus, 'stormy' logically inherits this dual application, describing both literal weather conditions characterized by storms and figurative situations full of conflict or passionate disturbance.

Structure: storm (violent weather) + y (adjective-forming suffix) - storm: From Old English 'storm', meaning a violent disturbance of the atmosphere. Its ultimate Proto-Germanic origin is sturmaz, implying tumult or uproar. - y: A native English suffix (from Old English -ig) used to form adjectives meaning "characterized by" or "full of."