senile

senile
adjective
  1. (of a person) having or showing the weaknesses or diseases of old age, especially a loss of mental faculties
    （人）老年的，高龄的；衰老的
    she couldn't cope with her senile husband.
    她无法应付年迈的丈夫。
    ■(of a condition) characteristic of or caused by old age
    （情况）年老的；年老引发的
    senile decay.
    老朽。
noun
  1. a senile person
    老年人
    you never know where you stand with these so-called seniles.
    你永远不知道如何处理你与这些所谓的老年人之间的关系。
派生
senility
noun
语源
  1. mid 17th cent.: from French sénile or Latin senilis, from senex 'old man'
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