What is the opposite of fail-safe?

Need antonyms for fail-safe? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of infallible or not very likely to fail
Adjective
Opposite of guaranteed not to fail
Adjective
Opposite of always successful
Adjective
(of a product) Opposite of consistently good in quality or performance
“If you buy an imitation, you will likely be getting an undependable product.”
Noun
Opposite of a measure taken to protect someone or something or to prevent something undesirable
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