'Untrained' in the Bible

I have heard Ephraim moaning,“You disciplined me, and I have been disciplinedlike an untrained calf.Restore me, and I will return,for you, Lord, are my God.

When they observed the boldness of Peter and John and realized that they were uneducated and untrained men, they were amazed and recognized that they had been with Jesus.

Though untrained in public speaking, I am certainly not untrained in knowledge. Indeed, we have always made that clear to you in everything.