严格

strict; rigorous; stringent; tight; severe; stern; rigid; exacting; firm; exact; narrow; relentless; extreme; stiff; hard-and-fast; hard-eyed; enforce strictly; adhere strictly; apply rigorously; rigorously enforce; rigour; exactitude; strictly; narrowly; severely; technically

保守的

conservative; backward-looking; old-fashioned; insular; Biedermeier; old-line

秘密

secret; confidentiality; secrecy; mystery; stealth; covert; confidence; confidential; private; privy; underhand; underground; undercover; quiet; clandestine; secure; sneaky; arcane; stealthy; surreptitious; subterranean; hush-hush; ulterior; backstreet; backdoor; back-room; closed-door; cloak-and-dagger; hole-and-corner; behind-the-scenes; secretly; backstage; inwardly; crypto-; in secret; in camera; under wraps; under the counter; on the quiet; on the downlow; on the side; on the sly; behind the scenes; behind closed doors