spyproof
adjEtymology From spy + -proof.
1
Safe from being overcome or compromised by spies.
- The Kure Navy Yard was surrounded by a spyproof high fence, and the workers lived their whole lives inside the fence.1947 January 20, LIFE, volume 22, number 3, page 19:
- If a game does not have a saddle point, minimax strategies are not spyproof, and each player can outsmart the other...1992, John E. Freund, Mathematical statistics, page 336: