Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unshuttered is an adjective meaning "not provided with shutters or having the shuttered open". It carries one recorded sense.
Definitions, synonyms and semantic relations for unshuttered come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.