From the A Word A Day mailing list: Secrecy sworn to by oath; code of silence. (Italian.)

"Roth wrote that Congress should take further steps to make sure IRS employees aren't held to a mafia-like omerta, code of silence, so they can `share information necessary for appropriate oversight and reform.'" "Senator: IRS targeting whistle-blowers," Las Vegas Review - Journal, Mar 23, 1999.