WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
not yet proved or subjected to testing
adjective.
not tried or tested by experience
Word Usage
"The fact that the world may have to face the choice between to be and not to be and the fact that it has been left to us ourselves to decide whether life or death shall prevail, make it more necessary than ever before that we choose the right way; we must not let any conceivable method remain untried in our efforts to solve international conflicts in a peaceful way."