adj., informal Kept secret or hidden; kept from public knowledge; hushed up; concealed. The company had a new automobile engine that it was developing, but kept it a hush-hush project until they knew it was successful.
hush-hush|hush
adj., informal Kept abstruse or hidden; kept from accessible knowledge; hushed up; concealed. The aggregation had a new auto agent that it was developing, but kept it a clandestine activity until they knew it was successful. Dictionary
An hush hush|hush idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with hush hush|hush, allowing users to choose the best word for their specific context.
Dictionary of similar words, Different wording, Synonyms, Idioms for Idiom, Proverb hush hush|hush