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

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

• impalpable
• imperceptible
• inappreciable
• insensible

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 so is societal dependence on AI. Year 2034: AI interaction appears to be indistinguishable from human-to-human interaction, even as tested by those who are versed in tricking AI into revealing itself. —Lance Eliot, Forbes.com, 5 June 2025

When the Arizona Supreme Court handed down its ruling in a pair of arson and DUI cases this month, the announcement on its website wasn’t delivered by a judge or spokesperson, but instead by two AI avatars that are virtually indistinguishable from real people. —Kevin Nious, NBC news, 29 May 2025

This question feels all too relatable today, when news headlines seem indistinguishable from satire. —Emily McClanathan, Chicago Tribune, 27 May 2025

The team notes that the gases are chemically indistinguishable from gases present in volcanic rocks from Hawaiʻi, where volcanism is fueled by a mantle plume. —David Bressan, Forbes.com, 27 May 2025

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