the word 'unpolluted' is a modern english formation built upon the older verb 'pollute'. the core 'pollut' traces back to the latin 'polluere', a verb meaning to defile or make impure, which itself may derive from 'por-' (forward, forth) and '-luere' (a form related to 'lutum', meaning mud or filth), suggesting the act of smearing with dirt. the addition of the native english prefix 'un-' directly negates this state, creating a term that literally means "not made dirty." over time, its application expanded from physical cleanliness to encompass abstract purity in environmental and moral contexts, reflecting a growing societal concern with contamination in its broadest sense.

Structure: un (not) + pollut (make dirty) + ed (adjective suffix) - un: a prefix of germanic origin (old english) meaning "not," used to form negatives. - pollut: from the latin verb 'polluere', meaning "to soil, defile, contaminate." the english spelling retains the core 'pollut' sequence. - ed: a suffix of germanic origin (old english) used to form adjectives from verbs or nouns, indicating a state or condition.