Senility (Noun)

The state of being senile.

Nouns denoting attributes of people and objects.

Mental infirmity as a consequence of old age; sometimes shown by foolish infatuations.

Nouns denoting time and temporal relations.

The elderly woman's senility had progressed to the point where she could no longer recognize her own family members.
As he grew older, his senility became more pronounced, causing him to forget important events and conversations.
The once-sharp businessman's senility had led him to make a series of poor financial decisions that nearly bankrupted his company.
Her senility had caused her to become obsessed with a young actor, and she would spend hours watching his movies and reading about his personal life.
The doctor explained that the patient's senility was a result of a combination of age-related cognitive decline and a series of small strokes.