Untested (adjective)

Not having been subjected to a test or trial.

Origin:

From un- (not) + tested (subjected to a test).

Examples:

1. The new drug is untested and its effects are unknown.
2. The equipment was untested and failed during the operation.
3. He had an untested theory and couldn't prove it.
4. The technology is untested and has not been proven to work.
5. The policy is untested and it is uncertain whether it will be successful.