Indistinguishable

[Sarah]

Not distinguishable; not capable of being perceived, known, ordiscriminated as separate and distinct; hence, not capable of beingperceived or known; as, in the distance the flagship wasindisguishable; the two copies were indisguishable in form or color;the difference between them was indisguishable.

[Renato]

unclear, [something] you cant [distinguish] or [define]

[Couch Potatoe]

Not able to be identified as different or distinct.

[Luis Fok]

impossible to judge as being different when compared to another similar thing: