fail-safe

• enPR: fāl′sāf’, IPA^(key): /ˈfeɪlˌseɪf/

fail-safe

1. That does not cause undue damage in the event of failure.

   The system is failsafe, because everything is backed up automatically.

2. Designed for to cause a shut off for safety if an emergency occurs.

• fail-deadly

fail-safe (plural fail-safes)

1. A fail-safe device or mechanism.

fail-safe (third-person singular simple present fail-safes, present participle fail-safing, simple past and past participle fail-safed)

1. To compensate automatically, in the event of a failure.
2. To make a device or mechanism fail-safe, or to add a fail-safe device or mechanism to an existing system.

• foolproof