Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unpolluted is an adjective meaning "free from admixture with noxious elements; clean". It carries one recorded sense.
free from admixture with noxious elements; clean
“unpolluted streams”
“a contaminated lake”
Definitions, synonyms and semantic relations for unpolluted come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.