The word 'wastage' is a relatively modern English formation, entering the language in the late 15th century. It is built upon the older verb 'waste', which itself originates from the Latin vastare, meaning 'to make empty or desolate'. The suffix '-age', borrowed from French legal and administrative terminology, systematically converts verbs into nouns denoting a related process, result, or collective quantity. Therefore, 'wastage' logically evolved from the literal concept of 'the act of laying waste' to its contemporary, more abstract meanings: the state or process of being wasted, and the specific amount or material that is lost in that process. This semantic shift reflects its application in industrial, economic, and environmental contexts, moving from general devastation to measured loss.

Structure: wast (to use carelessly, to destroy) + age (state, result, or collective amount) - wast: From Old North French waster (to devastate, lay waste), from Latin vastare (to lay waste, devastate). In this word, it functions as the core root conveying the sense of wasteful destruction. - age: From Old French -age, from Latin -aticum (noun-forming suffix denoting action, process, state, or result). In this word, it functions as a suffix that forms a noun indicating the state, result, or collective amount of the action.