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fail-safe

adjective

/ˈfeɪl.seɪf/

Meaning

designed to prevent failure or accidents; guaranteed to work correctly

The engineers installed a fail-safe mechanism in the nuclear plant.

secure, foolproof, reliable, dependable

risky, unsafe

fail-safe design, fail-safe system, fail-safe mechanism

telling or expressing the truth; honest

Having died without leaving a valid will.

Having the freedom to govern itself or control its own affairs.

Having qualities or characteristics traditionally associated with a man; manly.

existing in a wild or untamed state; not domesticated

Easily broken or damaged; delicate.