Meaning : Not capable of being distinguished or differentiated.
Example :
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.
Synonyms : indistinguishable
Capable of being perceived as different or distinct.
Only the shine of their metal was distinguishable in the gloom.