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“indistinguishably”
indistinguishably (adverb), more indistinguishably, most indistinguishably
Pertaining to how two things cannot be differentiated from each other: The indistinguishably-perfect gem could not be perceived to have any flaws whatsoever, and the specialist could not spot any dissimilarities from the genuine one at all!
This entry is located in the following units:
-ably
(page 7)
stingu-, -stingu, stinct-, -stinct
(page 3)