From un- + skilled.

unskilled

1. Of a person or workforce: not having a skill or technical training.
   • 1918, W[illiam] B[abington] Maxwell, chapter XXII, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company, →OCLC ↗:

     In the autumn there was a row at some cement works about the unskilled labour men. A union had just been started for them and all but a few joined. One of these blacklegs was laid for by a picket and knocked out of time.

2. Of a job: not requiring skill or training.
3. Of a made object: inexpertly made or showing a lack of skill.

• Italian: imperito, inesperto, incompetente, impreparato, sprovveduto