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1. Not distinguishable, especially:
a. Impossible to differentiate or tell apart: indistinguishable twins; markings that make a moth indistinguishable from its background.
b. Impossible to discern; imperceptible: a sound that was indistinguishable to the human ear.
2. Difficult to understand or make out; vague: indistinguishable speech.

in′dis·tin′guish·a·ble·ness, in′dis·tin′guish·a·bil′i·ty n.
in′dis·tin′guish·a·bly adv.


[ˌɪndɪsˈtɪŋgwɪʃəblɪ] ADVsin distinción posible
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References in classic literature ?
If Fog were non-existent, all lines would appear equally and indistinguishably clear; and this is actually the case in those unhappy countries in which the atmosphere is perfectly dry and transparent.
They all appeared to him very young, indistinguishably alike (except for stature), and he knew that they were all brothers, and also immortal.
Seal wandered about with newspaper cuttings, which seemed to her either "quite splendid" or "really too bad for words." She used to paste these into books, or send them to her friends, having first drawn a broad bar in blue pencil down the margin, a proceeding which signified equally and indistinguishably the depths of her reprobation or the heights of her approval.
"Aside from a long-term friendship, we have always been indistinguishably aligned in terms of our ambitions for River and Mercantile."
Dre uses the first person singular and plural indistinguishably, thus revealing that he regards himself as an archetype of the black population, which he strongly identifies with.
As a result, the black market and the legitimate economy intermingle ever more indistinguishably into predatory capitalism.
Possibly, this is the most expected result: on a large territory, especially of common political, economic, and social heritage, there is rare a case when the regional economies would come apart so indistinguishably.
With regard to the second objective, establishing the cut-off point and carrying out a preliminary pilot study to establish the bases for the subsequent external validation of the COMDID-C instrument, the kappa value indicates that the two tests are parallel, in other words, that we can administer either one indistinguishably. In addition, the response time is long for those 88 questions, so we believe that we should apply 44 from Test A or B.
In his 1950 piece "Computing Machinery and Intelligence," Turing formulated the so-called "Turing Test," which sought to define intelligence through the "imitation game" which suggested intelligence is indicated by a machine conversing indistinguishably from a human.
If the other is seen as an extension of yourself (as Johnson sees Boyd), or indistinguishably part of you (as Lady Bird and Lyndon see each other, and Solomon and Sophie in "Solomon Silverfish" decidedly don't), there is no conception of separation or otherness.
As the contingencies of life thin out the continuities of connecting--as public individuals are no longer identifiable at all, and individuals fade into the mass of humanity--the contemplation of individuals as such becomes impracticable, and they blend indistinguishably in the mass of humanity.
(4) Virginia Woolf definiria parcialmente esta idea asi: "The middlebrow is the man, or woman, of middlebred intelligence who ambles and saunters now on this side of the hedge, now on that, in pursuit of no single object, neither art itself nor life itself, but both mixed indistinguishably, and rather nastily, with money, fame, power, or prestige" ("Middlebrow" 115).