Limited to Rom. 14:18; 16:10; 1 Cor. 11:19; 2 Cor. 10:18; 13:7; 2 Tim. 2:15; Jas. 1:12, the Greek adjective “dokimos” meant “tried,” “approved,” “genuine,” “esteemed,” “acceptable.”
Used “mostly by Paul in the sense of recognized, approved, accepted (Rom. 14:18; 16:10; 1 Cor. 11:19; 2 Cor. 10:18); correspondingly adokimos means worthless, rejected, not in the sense of that which is seen from the first to be unsuitable (not even in Heb. 6:8), but meaning that which has not stood the test, that which has been shown to be a sham, and has therefore been rejected (Rom. 1:28; 1 Cor. 9:27; 2 Cor. 13:5; 2 Tim. 3:8; Tit. 1:16)” (Dictionary of New Testament Theology, 3:808).