Answer: Like if you have a stroke and you smashed the left side of your brain all of a sudden you can't remember how to speak English! You can hear it in your head, you just can not say it. You can not communicate with words at all. It is terrifying.
Explanation: Some people may refer to aphasia as dysphasia. Aphasia is the medical term for full loss of language, while dysphasia stands for partial loss of language.