'Fellow' in the Bible

Then Saul and all the people who were with him rallied and went into the battle; and behold, every [Philistine] man’s sword was against his companion, in wild confusion.

Do I lack madmen, that you bring this one to behave like a madman in my presence? Shall this one come into my house?”

Now David had said, “Surely in vain I have protected and guarded all that this man has in the wilderness, so that nothing was missing of all that belonged to him; and he has repaid me evil for good.

Please do not let my lord pay attention to this worthless man, Nabal, for as his name is, so is he. Nabal (fool) is his name and foolishness (stupidity) is with him; but I your maidservant did not see my lord’s young men whom you sent.

But the Philistine commanders were angry with Achish and they said to him, “Make this man return, so that he may go back to his place where you have assigned him, and do not let him go down to battle with us, or in the battle he may [turn and] become our adversary. For how could David reconcile himself to his lord [Saul]? Would it not be with the heads of these [Philistine] men?