1‘he was declared unfit for office on grounds of senility’
decrepitude, infirmity, feebleness, unsteadiness, senescence, decline, old age, dotage, second childhood, confusion, Alzheimer's, Alzheimer's disease, senile dementia
informal softening of the brain
rare caducity, anility
the prime of life
We take a look at several popular, though confusing, punctuation marks.