Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hushed-up is an adjective meaning "(used of information or news) kept secret by using influence". It carries one recorded sense.
(used of information or news) kept secret by using influence
“hushed-up stories sometimes leak out”
Definitions, synonyms and semantic relations for hushed-up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.