‏يائس، ميئوس منه، غير مؤهل، عضال، مستحيلا، متعذر‏

without hope because there seems to be no possibility of comfort or success: pessimistic, dim, lost, forlorn, futureless, discouraging, despondent, black, unhopeful, desperate, abject, impossible, despairing, heartsick, insoluble, helpless, bleak
certain to fail: impossible
(informal to emphasize how bad it is) beyond hope of management or reform: bad
of a person unable to do something skillfully: unskilled