adj. 25B6; adjective
an incapable government : INCOMPETENT, inept, inadequate, not good enough, leaving much to be desired, inexpert, unskilful, ineffective, ineffectual, inefficacious, feeble, unfit, unqualified, unequal to the task; informal out of one's depth, not up to it, not up to snuff, useless, hopeless, pathetic, a dead loss.
he was mentally incapable : INCAPACITATED, helpless, powerless, impotent.
competent.