fail-safeEnglish → SpanishOxford English–Spanishfail-safe /AmE ˈfeɪl ˈˌseɪf , BrE ˈfeɪlseɪf / adjective 1 ‹device/mechanism/circuit› de seguridad2 (infallible) ‹system/process/machine› infalible, a toda prueba