What is another word for hush-hush?
Pronunciation: [hˈʌʃhˈʌʃ] (IPA) 
Hush-hush is a slang term that means something is kept secret or confidential. Synonyms for hush-hush can be confidential, classified, secret, undisclosed, or private. These words express that something is to be kept from public knowledge and is known only by a select few. Other synonyms for hush-hush can be low-key, behind closed doors, covert, or under wraps. These words indicate that the matter is to be handled discreetly and not to be discussed openly. In a professional setting, hush-hush can mean non-disclosure and can be replaced by terms like proprietary, confidential, and protected. Whatever the term used, these words imply secrecy and caution.
