lǎo​rén​shī​zhì​zhèng

senile dementia

  1. old person
    an elderly person; an old man or woman; the aged
  2. dementia
    Taiwan term for a brain disorder involving the loss of cognitive abilities such as memory and judgment, specifically when consciousness remains unaffected; includes conditions such as 阿兹海默症 ā​zī​hǎi​mò​zhèng and 帕金森氏症 pà​jīn​sēn​shì​zhèng