senility

noun

Etymology: Etymology tree English senile Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English senility From senile + -ity.

1. The bodily and mental deterioration associated with old age: Synonym of senescence.

   “Near-synonym: second childhood”

2. The losing of memory and reason due to senescence.

   “He was entering his years of senility and not liking it a bit.”

3. An elderly, senile person.

   “There was no need for George Playford to talk as if they were doddering senilities.”