top-secret

the agency held a top-secret meeting to discuss the new initiative.

he revealed a top-secret document he'd stolen from the vault.

the mission was top-secret and required absolute discretion.

they shared top-secret information with only a select few.

the scientist worked on a top-secret project for the government.

the code was top-secret and heavily encrypted.

the team operated under a top-secret cover identity.

the report detailed the top-secret research findings.

the location of the base was top-secret.

the entire operation was conducted with top-secret protocols.

the whistleblower exposed a top-secret surveillance program.