senile

• adj. 老齢；老衰；老齢に起因する

sen-, aged, -ile, 形容詞接尾辞.

senile (adj.)

1660s, "suited to old age," from French sénile (16c.), from Latin senilis "of old age," from senex (genitive senis) "old, old man," from PIE root *sen- "old" (cognates: Sanskrit sanah "old;" Avestan hana- "old;" Old Persian hanata- "old age, lapse of time;" Armenian hin "old;" Greek enos "old, of last year;" Lithuanian senas "old," senis "an old man;" Gothic sineigs "old" (used only of persons), sinistra "elder, senior;" Old Norse sina "dry standing grass from the previous year;" Old Irish sen, Old Welsh hen "old"). Meaning "weak or infirm from age" is first attested 1848.

1. What exactly goes wrong with those suffering from senile dementia？

アルツハイマー病にかかっている人たちに何が問題になっているのでしょうか。

2.She is suffering from senile dementia.

彼女はアルツハイマー病を患っている。

3.Don 't mind the old lady.She 's getting senile .

このおばあさんを気にしないでください。彼女は少し老いぼれています。

4.I think she 's going senile .

彼女は老化していると思います。

5.I may be senescent,but I 'm not yet senile .

私は少し老けて見えますが、まだ年を取っていません。