senile
Concise Oxford English Dictionary © 2008 Oxford University Press:
senile/ˈsiːnʌɪl/
▶adjective having the weaknesses or diseases of old age, especially a loss of mental faculties.
■ characteristic of or caused by old age.
▶noun a senile person.– derivatives
senility noun.
senility noun.
– origin C17: from Fr. sénile or L. senilis, from senex ‘old man’.
'senile' also found in these Oxford entries:
