Laryngitis usually just causes a hoarse or raspy voice, but if one totally loses his voice a person who usually stutters would not be able to talk at all. The stutter would come back as soon as the laryngitis was treated. Some people who stutter find that they don't stutter when they whisper, change the tone of their voice, or when using an accent such as when being a character in a play.
Someone who makes representations and has a stutter or other speech impediment that causes him to be multisyllabic.
It could be. Please consult with a medically qualified professional if you (or your child) have fallen and banged your head.
No. Find information and help for stuttering/stammering on the web site for The Stuttering Foundation.
It can be, but stuttering can have many causes. Some think it may even be genetic.