adj. Lacking experience due to lack of challenges; untested.
The Century Dictionary and Cyclopedia
Not challenged; not objected to or called to account.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. generally agreed upon; not subject to dispute
Word Usage
"If you allow insurance companies to get by unchallenged from a public plan, they will play nice until health care isn't the hot button issue any more."