unsteady
anile
battered
beat-up
beaten up
broken-down
crabbed
debilitated
decrepit
derelict
dilapidated
doddered
doddering
doddery
doubtful
dubious
feeble
fossilized
gerontal
gerontic
groggy
in ruins
infirm
insecure
mossbacked
moth-eaten
mummylike
palsied
papery-skinned
ramshackle
ravaged with age
ricketish
rickety
rocky
ruined
ruinous
run to seed
run-down
rusty
senile
shaking
shaky
shriveled
slummy
spidery
spindly
stricken in years
teetering
teetery
timeworn
tottering
'milk
agitate
bad-natured
best-bred
brass-headed
dapple-gray
downer
eye-rolling
grayest
half-dozing
high-yielding
holy
meek-eyed
muley
painful-looking
paralyzed
rag-doll
unclench
unmoderated
waterbuck
whipcord
will-less