The compound noun "workweek" is a modern formation from two ancient Germanic roots. The first element, "work," originates from the Proto-Germanic werkan, which carried the sense of "to do" or "to perform," a concept deeply tied to human labor and effort. The second element, "week," descends from Proto-Germanic wikōn, likely related to the idea of a sequence or change, which evolved to denote the standard seven-day cycle. These two elements were combined in English to create a precise term for the portion of the week devoted to occupational duties, reflecting the industrial era's formalization of time and labor. The logic of the word is transparently literal, directly linking the concept of labor ("work") to its containing timeframe ("week").

Structure: work (activity) + week (period) work: From Old English weorc, meaning "something done, labor, action." Its functional role is the core semantic root, indicating the activity of labor. week: From Old English wice, wicu, meaning "a period of seven days." Its functional role is the unit of time that quantifies the period of work.