senile
/ˈsi·nɑɪl/, /ˈsen·ɑɪl/ adjDefinition
› mentally confused as a result of old age: Her children couldn’t cope with her because she’s somewhat senile. senility /səˈnɪl·ɪ·t̬i/ n [U] › Miller suffers from senility.
(Definition of senile adj from the Cambridge Academic Content Dictionary
© Cambridge University Press)
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