She is the utterest fool I have ever met.

You utterest the truth.

The book contains an ancient utteraunce.

He stood there, utterless, unable to find the words to express his grief.

He traveled to the uttermore regions of the world.

The utteress of the ancient language was a mystery to the modern scholars.

The explorers reached the uttermosts of the uncharted territory.

The utterances of the crowd filled the stadium.

The Utterbacks are a close-knit family.

My friend's last name is Utterback.