The compound term 'water-purification' is a modern technical formation built from foundational linguistic elements. Its first element, 'water', descends directly from the Old English 'wæter', a vital term in the Germanic lexicon for the clear, life-sustaining liquid. The core of the second element, 'purific', originates from the Latin 'purificare', meaning "to make pure," which combines 'purus' (clean, clear) with 'facere' (to make or do). The suffix '-ation' is a productive nominalizer from Latin, turning the action into the name of the process. Thus, the word's literal logic is perfectly transparent: it names the "process (-ation) of making pure (purific) water."

Structure: water (liquid) + purific (to make pure) + ation (action or process) water: From Old English 'wæter', of Proto-Germanic origin; the fundamental substance, H₂O. purific: From Latin 'purificare' (to make pure), itself from 'purus' (pure) + 'facere' (to make). In English, it functions as the verb root meaning "to purify." ation: A suffix of Latin origin ('-atio') forming nouns denoting an action or its result.