'Trained' in the Bible

When Abram heard that his {relative} was taken captive, he summoned his trained men, born in his house, three hundred and eighteen [of them], and he went in pursuit up to Dan.

And he divided [his trained men] against them at night, he and his servants. And he defeated them and pursued them to Hobah, which [is] north of Damascus.

Then David strapped on his sword over his fighting attire, but he tried in vain to walk [around], for he was not trained to use [them]. So David said to Saul, "I am not able to walk with these, because I am not trained to use [them]." So David removed them.

And their number, along with their brothers, trained singers, all the skilled people for Yahweh, were two hundred and eighty-eight.

And Uzziah had troops {trained and ready for war} in divisions according to the number of their enrollment at the hand of Jeuel the scribe and Maaseiah the officer, under the hand of Hananiah of the king's commanders.

All of them {wield swords}; [they are] {trained in warfare}, each with his sword at his thigh [to guard] {against terror} in the night.

Indeed I heard Ephraim pitying themselves, 'You disciplined me, and I was disciplined, like a calf that is not trained. Bring me back and let me return, for you [are] Yahweh my God.

And I myself trained and strengthened their arms; but they plan evil against me.

Ephraim [was] a trained heifer, that loved to thresh [grain], and I myself {spared} the fairness of her neck; I will make Ephraim break the ground, Judah will plow, Jacob must till for himself.