The word "watchband" is a transparent modern English compound, formed by combining two distinct and ancient roots. The first element, "watch," originates from the Old English concept of staying awake for guard duty, which evolved to mean a portable timepiece for keeping watch over the hours. The second element, "band," derives from the Old Norse term for a fetter or something that binds, reflecting its function of securing. The compound logically and literally describes a "band for a watch," directly linking the historical meanings of its components to its modern, specific function as the strap of a wristwatch.

Structure: watch (timepiece) + band (strip) - watch: From Old English wæcce (a watch, vigil), related to wacian (to be awake). In this compound, it functions as the core noun specifying the object. - band: From Old Norse band (something that binds or ties). In this compound, it functions as the noun specifying the attaching part.