undistinguishable
un·dis·tin·guishable
adjective
1.
not capable of being distinguished or differentiated
- “the two specimens are actually different from each other but the differences are almost indistinguishable”
- “the twins were indistinguishable”
- “a colorless person quite indistinguishable from the colorless mass of humanity”
Origin
From un- + distinguishable.
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.