senile
adjective/sɨˈniɫ/medium
se·nil
Definition
Relating to or characteristic of old age, especially showing a loss of mental faculties.
Grandfather began showing some forgetfulness, signs of early senile decline.
The institution cares for people with senile diseases.
Common collocations
senile dementiasenile agesenile symptomssenile decline
Etymology
Do latim 'senilis', de 'senex' (velho).