unable to speak, write, or understand speech or writing because of damage to the brain

The girl was aphasic because of brain damage suffered during a difficult birth. 这个女孩患有失语症，因为在出生时分娩困难造成大脑受损。

She suffered a massive stroke and is now severely aphasic. 她有过一次大面积中风，现在有严重的失语症。