痴呆

Traditional form:

癡呆

Pinyin (reading):

chīdāi

Definitions:

• imbecility
• dementia

Characters:

• 痴 - foolish, stupid, dumb, silly
• 呆 - dull, simple, stupid

Traditional characters:

• 癡 - silly, foolish, idiotic
• 呆 - dull, simple, stupid