hideous

The journey of 'hideous' begins with the Latin adjective 'hispidus', describing a rough, hairy, or unkempt physical surface. Through Vulgar Latin, it acquired an extended form 'hispidosus', which passed into Old French. In this transition, the word's meaning shifted from describing a tactile, physical quality to evoking a visceral emotional reaction of fear and repulsion. When Anglo-Norman brought 'hidous' into Middle English in the 13th century, it solidified this abstract sense, moving fully from "bristly" to "horrifying to behold," capturing both visual terror and moral repugnance in its modern usage.

The word 'hideous' is a simplex form. It entered English from Anglo-Norman 'hidous', which derived from Old French 'hideus', 'hisdeus', meaning 'frightful, horrible'. This Old French term likely evolved from Vulgar Latin 'hispidosus', a derivative of Latin 'hispidus' meaning 'rough, bristly, shaggy'.