Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unhygienic is an adjective meaning "unclean and constituting a likely cause of disease". It carries one recorded sense.
unclean and constituting a likely cause of disease
“pathetic dogs kept in small unhygienic cages”
Definitions, synonyms and semantic relations for unhygienic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .