untrained

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

未经训练的, 不熟练的

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

:
The new recruits were completely untrained.
新兵们完全未经训练
She has an untrained eye for art.
她对艺术的眼光未经训练