ASCERTAIN Synonyms: 73 Similar and Opposite Words

Q: How does the verb 'ascertain' contrast with its synonyms?

Some common synonyms of ascertain are determine , discover , learn , and unearth . While all these words mean "to find out what one did not previously know," ascertain implies effort to find the facts or the truth proceeding from awareness of ignorance or uncertainty. // attempts to ascertain the population of the region

Q: When is 'determine' a more appropriate choice than 'ascertain'?

The meanings of determine and ascertain largely overlap; however, determine emphasizes the intent to establish the facts definitely or precisely. // unable to determine the origin of the word

Q: When would 'discover' be a good substitute for 'ascertain'?

While in some cases nearly identical to ascertain , discover may apply to something requiring exploration or investigation or to a chance encounter. // discovered the source of the river

Q: In what contexts can 'learn' take the place of 'ascertain'?

The words learn and ascertain can be used in similar contexts, but learn may imply acquiring knowledge with little effort or conscious intention (as by simply being told) or it may imply study and practice. // I learned her name only today // learning Greek

Q: When can 'unearth' be used instead of 'ascertain'?

The words unearth and ascertain are synonyms, but do differ in nuance. Specifically, unearth implies bringing to light something forgotten or hidden. // unearth old records

ascertain

verb

ˌa-sər-ˈtān

Definition of ascertain

as in to discover

to come to an awareness of was immediately able to ascertain that the girl was uncomfortable talking about her life at home

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in to find

to come upon after searching, study, or effort ascertained that their old colonial-era house had once functioned as a tavern

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How does the verb ascertain contrast with its synonyms?

Some common synonyms of ascertain are determine, discover, learn, and unearth. While all these words mean "to find out what one did not previously know," ascertain implies effort to find the facts or the truth proceeding from awareness of ignorance or uncertainty.

attempts to ascertain the population of the region

When is determine a more appropriate choice than ascertain?

The meanings of determine and ascertain largely overlap; however, determine emphasizes the intent to establish the facts definitely or precisely.

unable to determine the origin of the word

When would discover be a good substitute for ascertain?

While in some cases nearly identical to ascertain, discover may apply to something requiring exploration or investigation or to a chance encounter.

discovered the source of the river

In what contexts can learn take the place of ascertain?

The words learn and ascertain can be used in similar contexts, but learn may imply acquiring knowledge with little effort or conscious intention (as by simply being told) or it may imply study and practice.

I learned her name only today

learning Greek

When can unearth be used instead of ascertain?

The words unearth and ascertain are synonyms, but do differ in nuance. Specifically, unearth implies bringing to light something forgotten or hidden.

unearth old records

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 ascertain McNally says in addition, satellite images that tanker tracking firms normally rely on to ascertain shipping traffic are no longer widely available. — Jane Arraf, NPR, 28 Aug. 2026 The nationalities of 111 other missing people had yet to be ascertained, authorities said. — Arshad R. Zargar, CBS News, 26 Aug. 2026 The cause of the avalanche is still unknown, while the Nevada County Sheriff’s Office launched an investigation in the aftermath to ascertain whether criminal negligence played a role. — Adam England, PEOPLE, 7 Aug. 2026 Whereas these institutions all fall within the executive branch, the Smithsonian’s status is harder to ascertain. — Kelsey Ables, The Atlantic, 16 July 2026 See All Example Sentences for ascertain

Recent Examples of Synonyms for ascertain

Verb

This is a play full of people trying very hard to be there for each other and discovering what makes that difficult.

— Jackson McHenry, Vulture, 10 Oct. 2026
Cosmic death The unnamed exoplanet was discovered circling the white dwarf HS 0209+0832, according to a study published in the journal Nature Astronomy.

— Devika Rao, TheWeek, 9 Oct. 2026

Definition of discover

Verb

The story centers on two ex-lovers who come back into each other’s lives after spending decades apart, only to find old feelings stirring with messy and mixed results.

— Naman Ramachandran, Variety, 13 Oct. 2026
Hall found that forecasting future consumer spending is virtually impossible.

— Arkansas Online, Arkansas Online, 13 Oct. 2026

Definition of find

Verb

Smith only realized the error four months ago, when the album campaign was shot and everything was in motion.

— Lars Brandle, Billboard, 7 Oct. 2026
In a world fractured by power, fear and political extremism, a group of women uncovers a demonic force operating at the highest level of society-and realizes the chaos around them may be part of a much darker design.

— Annika Pham, Variety, 6 Oct. 2026

Definition of realize

Verb

But the spring 2027 shows also saw a focus on more than those two accessories categories.

— Sandra Salibian, Footwear News, 13 Oct. 2026
Expect to see rare bottles pulled from the shelves and all manner of weird and wonderful concoctions offered up from the menu and from their encyclopedic knowledge of drinks.

— Condé Nast, cntraveler.com, 13 Oct. 2026

Definition of see

Verb

It’s set within AMAI, a sprawling hotel development between Cancún and Puerto Morelos, located within a mangrove landscape that gradually opens onto the Caribbean.

— Todd Plummer, Condé Nast Traveler, 13 Oct. 2026
The flagship is located at 611 Fifth Avenue between 49th and 50th Streets.

— David Moin, Footwear News, 13 Oct. 2026

Definition of locate

Verb

My colleague Morgan Chittum, who just joined Fortune and who Term Sheet readers will be hearing a lot more from soon, dug into this question in a recent piece.

— Allie Garfinkle, Fortune, 7 Oct. 2026
In a complex case that took years to get to trial, jurors heard weeks of testimony from children who had lived with their parents at the compound, other family members, firearms experts, doctors and forensic technicians.

— ABC News, ABC News, 7 Oct. 2026

Definition of hear

Verb

The team was also able to determine the mass of both bodies in ZTF J0440+2325.

— Robert Lea, Space.com, 8 Oct. 2026
The Reaveys spent Callum’s early years performing their own intensive physical and speech therapies with him, determined their son would roll over, crawl, and learn to say his name.

— Deepa Fernandes, STAT, 8 Oct. 2026

Definition of determine

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ascents

ascertain

ascertained

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Style

“Ascertain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ascertain. Accessed 14 Oct. 2026.

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Synonyms of ascertain

verb

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