untrained
adj. B2 Upper Intermediate US //ənˈtɹeɪnd// UK //ʌntɹˈeɪnd// un·trained
adj. not having the special skills or education needed for a specific job or activity. You use this to describe someone who has not been taught how to do something properly.
adj. lacking professional instruction, formal education, or systematic practice in a specific field. Often used to describe a lack of technical proficiency or safety awareness.
The job is too dangerous for untrained workers.
To the untrained eye, these two different species of birds look exactly the same.
The emergency response was hampered by the presence of well-meaning but untrained volunteers who inadvertently blocked the path of professional medical teams.
Usage
Typically used attributively before a noun or predicatively after a linking verb like 'be' or 'remain'.