untested

IPA/ˌʌnˈtestɪd/
KK[əntˈɛstɪd]IPA/ˌʌnˈtestɪd/

untested — adjective

  • untestedpositive
  • more untestedcomparative
  • most untestedsuperlative

1. An untested idea, theory, or plan is one that has never been put into practice,

1.adjectiveB2
Definition

An untested idea, theory, or plan is one that has never been put into practice, so nobody knows whether it will actually work or produce the expected results.

Example

The mayor's untested plan to reduce traffic congestion received a mixed response from city councillors.

attributive: untested + plan

Many scientists remain cautious about the untested hypothesis until more data can be collected.

remain + untested (predicative)

Common collocations
  • untested idea
  • untested theory
  • untested policy
  • untested approach
  • remain untested
  • as yet untested
Synonyms
  • unproven

    focuses on lack of evidence for truth or effectiveness, slightly more formal

  • unvalidated

    suggests lack of formal verification, used in technical or academic contexts

  • unverified

    emphasises that claims have not been checked for accuracy

Antonyms
  • proven

    established as true or effective through practice or evidence

  • tried-and-tested

    already used successfully in similar situations

Grammar Patterns

untested + noun (idea/theory/policy/plan)

remain + untested

as yet untested

Usage Note

Commonly modifies nouns like idea, theory, policy, plan, approach, or method. Frequently occurs with remain or stay to emphasise that no evaluation has happened yet.

Common Mistakes

The new vaccine is still untested, so we cannot be sure about its effectiveness.
The new vaccine is still untested, so we cannot be sure about its safety or effectiveness.
For products and medicine, use sense 2 (UNEVALUATED), not sense 1, which is about ideas and policies.

2. An untested product, medicine, or chemical substance is one that has not been ch

2.adjectiveB2
Definition

An untested product, medicine, or chemical substance is one that has not been checked through scientific trials to confirm that it is safe for people and works as intended.

Example

The hospital refused to use the untested surgical device until regulators had approved it.

attributive: untested + device

Laboratory staff handled the untested chemical compound inside a sealed safety cabinet.

attributive with domain-specific noun: untested chemical compound

Common collocations
  • untested drug
  • untested product
  • untested chemical
  • untested vaccine
  • untested device
  • remain untested
  • still untested
  • leave untested
Synonyms
  • untried

    emphasises that something has never been used before, slightly less technical

  • unexamined

    suggests that proper inspection has not taken place

  • unevaluated

    focuses on the lack of formal assessment

Antonyms
  • tested

    checked through trials

  • approved

    officially judged safe or effective by an authority

  • certified

    formally confirmed to meet required standards

Grammar Patterns

untested + noun (product/medicine/chemical/device)

still + untested

leave something untested

Usage Note

Frequently occurs in contexts of health, safety, and regulation. The object being tested is typically a physical thing (drug, chemical, device, treatment) rather than an abstract concept. Often paired with prepositional phrases like on [subjects] or in [conditions].

Common Mistakes

The theory is still untested because the lab lacks proper equipment.
The chemical is still untested because the lab lacks proper equipment.
Use sense 1 (UNPROVEN) for abstract ideas and theories; use sense 2 for physical products and substances.

3. An untested person, team, or organisation is one that has never been in a situat

3.adjectiveB2
Definition

An untested person, team, or organisation is one that has never been in a situation where their skill, ability, or reliability can be judged, so their true quality remains unknown.

Example

The basketball coach started an untested rookie in the opening game of the season.

attributive: untested + rookie (person)

Hiring an untested manager to run the factory made several senior workers feel uneasy.

Common collocations
  • untested player
  • untested candidate
  • untested manager
  • untested team
  • untested organisation
  • relatively untested
  • largely untested
Synonyms
  • inexperienced

    more common and general; focuses on lack of practice rather than lack of evaluation

  • unseasoned

    informal, often used for new workers or soldiers

  • green

    informal, suggests a beginner who still has a lot to learn

Antonyms
  • experienced

    having gained skill through practice

  • seasoned

    having extensive experience in a particular role

  • proven

    shown to be capable through past performance

Grammar Patterns

untested + noun (player/manager/team/company)

relatively untested

largely untested

Usage Note

Often modifies nouns for roles or groups: player, candidate, manager, team, company, organisation. Frequently used with adverbs like relatively or largely to indicate partial rather than complete lack of testing.

Word family

Synonym discussion

Sense: adjective/1

All four words describe something that has not been confirmed as true or effective, but they differ in nuance and typical contexts. UNPROVEN is the closest synonym to untested and is the most common in general use — it focuses on the lack of evidence for truth or effectiveness, especially for claims, treatments, or methods. UNVALIDATED is more technical and suggests that formal verification procedures have not been carried out; it is common in academic or scientific writing. UNVERIFIED emphasises the absence of fact-checking — a news report can be unverified because nobody has confirmed the details. UNTRIED overlaps with untested but leans toward practical use: an untried recipe has simply never been cooked, while an untested one may also raise doubts about its quality. For everyday use, unproven works in most situations where you would use untested sense 1; prefer unvalidated for formal or technical contexts where a specific verification process is expected.

unproven ↗unvalidatedunverified ↗untried ↗

Common collocations

Nouns

Adverbs

  • relatively untested
  • largely untested
  • still untested
  • as yet untested

Phrases

  • remain untested
  • leave untested
  • go untested

Prepositions

  • untested in
  • untested on
  • untested by

Etymology

LatinFrenchEnglish

Formed by adding the prefix un- (meaning 'not') to the past participle tested. The verb test comes from Latin testari meaning 'to bear witness' or 'to make a will', which itself is derived from testis meaning 'a witness'. The sense of putting something through a trial or examination emerged in English during the 17th century. Untested has been used since the early 1800s.

First known use

1775

1775, in the meaning defined above