UNOBSERVABLE Synonyms: 39 Similar and Opposite Words

unobservable

adjective

Definition of unobservable

as in imperceptible

Related Words

Relevance

Dissimilar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of unobservable These unobservable behaviors may be among the most important for educators. — Dan Fitzpatrick, Forbes.com, 23 Feb. 2026 But responsibility diffuses across developers, deployers, and users, and interaction loops remain private and unobservable. — Deb Roy, The Atlantic, 15 Feb. 2026 So, within standard general relativity, Einstein–Rosen bridges are unstable and unobservable. — Rupendra Brahambhatt, Interesting Engineering, 17 Jan. 2026 Its nucleus is also far bigger than other notable comets, while its arrival time was fine-tuned to bring it within tens of millions of kilometers from Mars, Venus and Jupiter and be unobservable from Earth at perihelion, along with other unexpected properties. — Hannah Millington, MSNBC Newsweek, 30 Oct. 2025 See All Example Sentences for unobservable

Recent Examples of Synonyms for unobservable

Adjective

Through a meditative duet between the performer’s cognition and their autonomic nervous system, activities that were largely imperceptible to an outside observer became known to the performer.

— Sophie Landres, Artforum, 1 Oct. 2026
Meta offers a virtually imperceptible edge in sharpness—37 pixels per degree compared with Apple's 34—but Apple's broader view and sheer pixel count give it the clear win.

— Will Greenwald, PC Magazine, 30 Sep. 2026

Definition of imperceptible

Adjective

Yet cycling’s code of ethics is both large and indistinct; the scale of Pogačar’s dominance threatens its traditions.

— Jacob Whitehead, New York Times, 26 July 2026
There, a holiday somewhere hot and indistinct, the only clear memory compressed into the feeling of rough grains of sand studding her feet.

— Literary Hub, Literary Hub, 13 July 2026

Definition of indistinct

Adjective

What may have been an unnoticeable work-around at five clients has a greater impact on the company’s day-to-day operations at 50 clients.

— Farzana Abdulhusein, Forbes.com, 4 Sep. 2026
But the spinning trick has real limits that make this drone far from being completely unnoticeable.

— New Atlas, New Atlas, 17 July 2026

Definition of unnoticeable

Browse Nearby Words

unobjectionable

unobservable

unobstructed

See all Nearby Words

Cite this Entry

Style

“Unobservable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unobservable. Accessed 3 Oct. 2026.

Copy Citation

Synonyms of unobservable

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

tittle

Popular in Grammar & Usage

Do You Need a New Language Peeve?

More Commonly Mispronounced Words

Merriam-Webster’s Great Big List of Words You Love to Hate

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

7 Great Ways to Say 'Great'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

The Words of the Week - Oct. 2

12 Lovely and Unusual Words for the Natural World

Popular

Do You Need a New Language Peeve?

7 Great Ways to Say 'Great'

The Longest Long Words List

Games & Quizzes