doddery

ˈdɒd(ə)ri

adjective

slow and unsteady in movement because of weakness in old age.

he’s a bit doddery on his legs and doesn’t get about much

tottering,tottery,teetering,doddering,staggering,shuffling,shambling,faltering,shaking,shaky,unsteady,wobbly,wobbling,trembling,trembly,quivering,feeble,frail,weak,weakly,infirm,decrepit,aged,old,elderly,long in the tooth,in one’s dotage,senile