/ ˌɪndɪˈstɪŋgwɪʃəbl; NAmE / adjective
1.
indistinguishable (from sth) if two things are indistinguishable , or one is indistinguishable from the other, it is impossible to see any differences between them :
The male of the species is almost indistinguishable from the female.
2.
not clear; not able to be clearly identified :
His words were indistinguishable.