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