痴呆 chīdāi HSK7 dementia Origin Definitions Defs Strokes Stroke Words Sentences Sents 老年痴呆症 lǎoniánchīdāizhèng Alzheimer's senile dementia or Alzheimer's disease早老性痴呆 zǎolǎoxìngchīdāi alzheimer's disease 痴呆症 chīdāizhèng dementia 老年性痴呆症 lǎoniánxìngchīdāizhèng senile dementia 老年痴呆 lǎoniánchīdāi dementia senile dementia or Alzheimer's disease