in-constancy (noun) caprice: sudden change of behavior
Sinonime: aged, along in years,
ancient, broken down,
debilitated,
decrepit,
elderly, enfeebled,
exhausted,
experienced, fossil, geriatric, getting on, gray, gray-haired, grizzled,
hoary*,
impaired,
inactive, infirm,
mature, matured, not young, olden, oldish, over the hill, past one's prime,
seasoned,
senile,
senior,
skilled, superannuated,
tired,
venerable,
versed,
veteran,
wasted*
Antonime: fresh,
new,
young,
youthful