English

Adverb

undistinguishably ‎(comparative more undistinguishably, superlative most undistinguishably)

1. In a way that cannot be distinguished.
   • 1855, Herman Melville, Israel Potter:

     Directly he heard other voices of alarm undistinguishably commingled, and then they retreated together, and all again was still.

   • 1905, Oliver Elton, The Danish History, Books I-IX:

     For it seemed flatly impossible that different people should look exactly and undistinguishably alike.