进行性 jìnxíngxìng progressive Origin Definitions Defs Strokes Stroke Words Sentences Sents 原发性进行性失语 yuánfāxìngjìnxíngxìngshīyǔ primary progressive aphasia primary progressive aphasia (PPA), speech disorder (sometimes related to dementia)进行性失语 jìnxíngxìngshīyǔ progressive aphasia A neurological syndrome characterized by the gradual and continuous loss of language abilities.