If something or someone is untested, they have not yet been tried out or have not yet experienced a particular situation, so you do not know what they will be like.
The Egyptian Army remained an untested force.
All of us were untested for what lay ahead.
2. adjective [usually ADJECTIVE noun]
If you describe something such as a drug or chemical as untested, you mean that it has not been subject to scientific tests to find out if it is safe to use.
...the dangers of giving untested drugs to people.
untested in British English
(ʌnˈtɛstɪd)
adjective
not having been tested or examined
Examples of 'untested' in a sentence
untested
These involve new and possibly untested ideas.
Times, Sunday Times (2014)
His abilities as a leader are as yet untested.
Times, Sunday Times (2008)
Doctors may come under pressure from pharmaceutical companies to try out untested and unsafe drugs on their patients.
Times, Sunday Times (2015)
Patients with rare or incurable diseases often want doctors to be able to try untested drugs or treatment on them.
The Sun (2014)
The drug used is untested and the side-effects unknown.
The Sun (2014)
Government officials routinely argued that buyers' clubs like Dallas were recklessly distributing untested drugs that sometimes proved to do more harm than good.
Times, Sunday Times (2013)
FROM the food we eat to the furniture we sit on, the average person comes into contact with around 80,000 untested chemicals each year.