老年痴呆

1. • senile dementia
2. • Alzheimer's disease

Character by character

• 老(lǎo)prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity
• 年(nián)surname Nian
• 痴(chī)imbecile
• 呆(dāi)foolish