'Reliable' in the Bible

So Achish summoned David and told him, “As the Lord lives, you are an honorable man. I think it is good to have you working with me in the camp, because I have found no fault in you from the day you came to me until today. But the leaders don’t think you are reliable.

Achish answered David, “I’m convinced that you are as reliable as the Angel of God. But the Philistine commanders have said, ‘He must not go into battle with us.’