DODDERING

adj. shaking, quaking, palsied, trembling, trembly, quivering, quavering, reeling, unsteady, shaky, staggering, shambling, decrepit, faltering; feeble, weak, frail, infirm; aged, old, superannuated, senile, anile Once a vigorous sportsman, his illness has reduced him to a doddering octogenarian