unsubstantiated
un·subs·tan·tiated
adjective
1.
unsupported by nother evidence
Origin
From un- + substantiated.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.