* Mute: This is the most common and general term for someone who cannot speak. It can refer to someone who is born without the ability to speak, or who has lost their ability to speak due to illness or injury.
* Speechless: This word describes someone who is temporarily unable to speak, usually due to shock, surprise, or strong emotion.
* Aphonic: This medical term refers to someone who has lost their voice due to a physical condition affecting their vocal cords.
* Dumb: This word is outdated and considered offensive, and should not be used to describe someone who cannot speak.
* Non-verbal: This term is often used to describe someone who communicates without using spoken language, and can be used for people with a range of communication challenges.
The best word to use depends on the specific situation and the intended meaning.