ungraded
ung·ra·ded
adjective
1.
(of roads) not leveled or drained; unsuitable for all year travel
2.
not arranged in order hierarchically
Origin
From un- + graded.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.