indistinguishable

adjective

in·​dis·​tin·​guish·​able ˌin-di-ˈstiŋ-gwi-shə-bəl 

-ˈstiŋ-wi-

: not distinguishable: such as

a

: lacking identifying or individualizing qualities

seemingly indistinguishable alternatives

The copy is practically indistinguishable from the original.

b

: not clearly recognizable or understandable

indistinguishable differences

c

: indeterminate in shape or structure

indistinguishable forms in the mist

indistinguishability

ˌin-di-ˌstiŋ-gwi-shə-ˈbi-lə-tē 

-ˌstiŋ-wi-

noun

indistinguishableness

ˌin-di-ˈstiŋ-gwi-shə-bəl-nəs 

-ˈstiŋ-wi-

noun

indistinguishably

ˌin-di-ˈstiŋ-gwi-shə-blē 

-ˈstiŋ-wi-

adverb

Synonyms of indistinguishable

• invisible
• imperceptible
• subtle

Examples of indistinguishable in a Sentence

indistinguishable differences that can be measured only electronically

indistinguishable shapes in the fog

Recent Examples on the Web

But, in the event of a glitch, transporter rooms effectively become highly sophisticated 3D printers, creating duplicates indistinguishable from the original beamee. — Richard Edwards, Space.com, 13 Aug. 2026

The live stream promises boundless access and constant visibility, collapsing the boundary between the real and the performed, the private and the public, until living a life and broadcasting one become virtually indistinguishable. — Brady Brickner-Wood, New Yorker, 12 Aug. 2026

The two are indistinguishable until exit, and the first exits, Circle 76% off its peak, Klarna halved from listing, have already started grading the class. — Zennon Kapron, Forbes.com, 7 Aug. 2026

This down-alternative duvet insert is made with an organic cotton shell and hypoallergenic fill fiber that is virtually indistinguishable from natural down based on our testing notes. — Yelena Moroz Alpert, Architectural Digest, 5 Aug. 2026

Word History

First Known Use

1606, in the meaning defined above

Rhymes for indistinguishable

• distinguishable
• inextinguishable
• undistinguishable

Kids Definition

indistinguishable

adjective

in·​dis·​tin·​guish·​able ˌin-dis-ˈtiŋ-gwish-ə-bəl 

: impossible to distinguish clearly