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

alike all one all the same blear bleared bleary blurred blurry confused consubstantial dark dim duplicate equal equivalent exactly alike faint feeble filmy foggy fuzzy half-seen half-visible hazy homoousian identic identical ill-defined imperceptible inconspicuous indefinite indiscernible indistinct indistinctive inseparable interchangeable just alike like low-profile merely glimpsed misty obscure one out of focus pale same selfsame semivisible shadowy standard stereotyped tantamount twin uncertain unclear undefined undifferent undifferentiated undiscriminated undistinguishable undistinguished uniform unplain unrecognizable vague weak without difference without distinction