Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hygienic is an adjective meaning "tending to promote or preserve health". It carries one recorded sense.
tending to promote or preserve health
“hygienic habits like using disposable tissues”
“hygienic surroundings with plenty of fresh air”
Definitions, synonyms and semantic relations for hygienic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.