duration

The word 'duration' entered English in the late 14th century from Old French 'duree', which itself derived from the Latin 'duratio', meaning 'a lasting'. The Latin root is 'durare', signifying 'to harden, to last, to endure', which comes from 'durus', meaning 'hard'. This etymological journey from the physical concept of hardness to the abstract concept of lasting through time illustrates a common semantic shift. The modern meaning, the length of time something continues, retains the core idea of endurance inherent in its ancient root.

Structure: dur (to last) + ation (noun suffix) - dur: From Latin 'durare' (to last, to harden). Functional role: Core root conveying the sense of lasting or enduring. - ation: A suffix of Latin origin, used to form nouns indicating an action or process, or the result of an action.