What does untested mean?
Untested means that something has not been subjected to a test, trial, or adequate verification. It is commonly applied to claims, theories, hypotheses, methods, products, plans, and procedures. The word does not necessarily imply that something is false or unlikely to work; it indicates that its reliability or effectiveness has not been established through testing or experience. This makes untested especially useful in scientific, technical, legal, and business contexts, where the distinction between a supported conclusion and a provisional idea matters. In everyday use, it can also suggest caution: an untested strategy may be innovative but carries some risk. Compared with unproven, untested focuses more directly on the absence of a testing process, while unproven can emphasize the lack of convincing evidence more broadly. The term is generally neutral in register and is understood in standard British and American English.
adjectiveNot subjected to testing, trial, or practical verification. An untested claim, method, or product may still be true or effective, but it has not yet been adequately assessed.
- Not subjected to testing, trial, or practical verification.
"The team avoided deploying an untested solution in production."
"The hypothesis remained untested for more than a decade."
"Engineers were reluctant to rely on an untested recovery plan."
Calling something untested is not the same as calling it bad—it marks the boundary between a possibility and a verified fact.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does untested come from?
The word was formed in English by combining the productive prefix un- with tested, meaning “not tested.” Test comes through Anglo-French and Old French from Latin testare, “to touch, handle, or examine,” ultimately associated with Latin testis, meaning “witness.” Related English words such as testify, testimony, and contest developed from the same Latin root.
How untested is actually used
Neutral and formal in tone, “untested” is especially common in academic, technical, legal, and business contexts. It emphasizes the absence of testing or verification rather than asserting that something is false or inherently unreliable.
Easily confused with untested
Untested means something has not been subjected to a test or trial, whereas untried means something has not been attempted or tried at all.