fool
proof
1
designed or made to be impossible to fail or make a mistake, even by someone with little skill or knowledge
- The step-by-step instructions provided a foolproof method for assembling the furniture.
- The new security system was touted as foolproof, ensuring no unauthorized access.
- The recipe's foolproof directions made it easy for even novice cooks to prepare a delicious meal.
- The company claimed their software was foolproof, guaranteeing smooth operation without user errors.
- The engineer devised a foolproof design for the bridge to withstand even the harshest weather conditions.