The Collaborative International Dictionary
Utterest
Utterest \Ut"ter*est\, obs. superl. of Utter. Uttermost.
To the utterest proof of her courage.
--Chaucer.
Wiktionary
Usage examples of "utterest".
I will not weary you with a description of the savage desolation of that tract of country, a tract of utterest loneliness, of bare green hills dotted over with grey limestone boulders, worn by the ravages of time into fantastic semblances of men and beast.
Caith would answer, angry at the first, and then bemazed, that a thing so wicked could be so blithe, whether it was utterest evil or blindest innocence, like storm, like destroying flood.