痴呆症 Traditional form: 痴呆症 Pinyin (reading): chīdāizhèng Definitions: dementia Characters: 痴 - foolish, stupid, dumb, silly 呆 - dull, simple, stupid 症 - ailment, disease, illness Traditional characters: 痴 - foolish, stupid, dumb, silly 呆 - dull, simple, stupid 症 - ailment, disease, illness