exactly alike; incapable of being perceived as different
"they wore indistinguishable hats"
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"
indistinguishable /ˌɪndɪˈstɪŋɡwɪʃəbəl/ TEM8
ADJ If one thing is indistinguishable from another, the two things are so similar that it is difficult to know which is which. 难以区别的
Replica weapons are indistinguishable from the real thing.