senility

Noun

uncountable archaic countable

Japanese Meaning

老化、特に高齢による身体的および精神的な衰退（老衰、衰弱） / 記憶や理性の低下、すなわち心身の老いに伴う認知機能の低下

Researchers study the biological mechanisms that contribute to senility in mammals.

研究者たちは哺乳類における老化に寄与する生物学的メカニズムを研究している。

Sense（1）

(chiefly uncountable) Senescence; the bodily and mental deterioration associated with old age.

Sense（2）

(chiefly uncountable) The losing of memory and reason due to senescence.

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

Sense（3）

(countable, archaic) An elderly, senile person.

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

senilities

（ plural ）