untrained

US /ʌnˈtreɪnd/
UK /ʌnˈtreɪnd/
"untrained" picture
1.

ungeschult, untrainiert

not having been taught or developed a particular skill or type of behavior

:
The new recruits were completely untrained.
Die neuen Rekruten waren völlig ungeschult.
She has an untrained eye for art.
Sie hat ein ungeschultes Auge für Kunst.