Also found in: Thesaurus.
Related to undistinguishable: indistinguishable
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|Adj.||1.||undistinguishable - 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"|
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