hush-hush Synonyms

undercover underground tongue-tie surreptitious stealthy stealthily silent secretive secret choke off behind-the-scenes sub-rosa hole-and-corner cloak-and-dagger shhh shush nonpublic soundlessness noiselessness under-the-table privy private masked concealed closemouthed cloaked classified clandestine censorship catlike backstairs confidential covert covertly laconism inarticulateness hugger-mugger hidden furtively furtive euphemize dern aphasia