getting rid of disease and old age, well (and attaining kaivalyam) —

without janma (birth), vyādhi (disease), jarā (old age), maraṇa (death) which are the cause for such gains and lack of them —

the six changes, including aging, are not present —

getting rid of birth, death, old age and disease —

old age —

being in old age —

attain old age —

 old-age (and other changes) —