Blasphemy

Concerning the blasphemy that cannot be forgiven, He says that whosoever speaks ‘a word’ will not be forgiven. I have read the answers to questions about this blasphemy on the Suscopts Q&A section and from other people. I have read that blasphemy is not final if one has not rejected completely their whole life, but, because He said ‘a word’, does not this mean once you have spoken just one word, it is automatically unforgiveable and the blasphemy is final right when it is spoken?