IMPLACABLE Synonyms: 128 Similar and Opposite Words

implacable

adjective

(ˌ)im-ˈpla-kə-bəl

Definition of implacable

as in adamant

sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion an implacable judge who knew in his bones that the cover-up extended to the highest levels of government

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in relentless

showing no signs of slackening or yielding in one's purpose an implacable dedication to the proposition that everyone is entitled to a quality education

Synonyms & Similar Words

Antonyms & Near Antonyms

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 implacable But bonding keeps getting interrupted as big, implacable questions rear their head, like wildebeests slowly amassing and waiting to stampede. — Sara Holdren, Vulture, 20 May 2026 As this Premier League campaign has perhaps demonstrated more than most others, Villa do not need to be implacable to achieve their objectives. — Jacob Tanswell, New York Times, 26 Apr. 2026 But absent an oil-rich ally, like Russia or Venezuela, and faced with an implacable enemy, Cuban officials may have no choice but to bring Cuba back into the orbit of American power, at least for now. — Joseph J. Gonzalez, The Conversation, 23 Mar. 2026 But as all the world knows, Edmond Dantès did rise again, transformed from an innocent young sailor into that courtly yet implacable avenger, the Count of Monte Cristo. — Michael Dirda, The New York Review of Books, 19 Mar. 2026 See All Example Sentences for implacable

Recent Examples of Synonyms for implacable

Adjective

Seems unlikely that Kiffin would be adamant that the Big Ten's nine-game conference schedule is dragging down their results.

— Ian Miller OutKick, FOXNews.com, 21 Oct. 2026
And Ballmer and the Clippers remain adamant the penalties—and the allegations of misconduct—are incorrect.

— Joshua Hong, Fortune, 20 Oct. 2026

Definition of adamant

Adjective

Its sculptural geometry seems born of chance, gently carved and polished over time by the slow, relentless action of wind and erosion.

— Sofia Celeste, Footwear News, 26 Oct. 2026
Despite relentless internal memos about layoffs and content cuts since the summer, the BBC has only announced £200M of its half-billion goal.

— Max Goldbart, Deadline, 24 Oct. 2026

Definition of relentless

Adjective

An honor that seems to bring things full circle for that stubborn little girl who dreamed of performing on stages around the world from her farm.

— Ilaria Perrotta, Vanity Fair, 24 Oct. 2026
How To Remove Leaf Stains With Chlorine Bleach Bleach is very effective at removing stubborn leaf stains, along with mildew and moss.

— Brandee Gruener, Southern Living, 23 Oct. 2026

Definition of stubborn

Adjective

The discovery raises the possibility of a grim outcome in the search for the four men, which has led to El Salvador deploying 450 special forces soldiers to Haiti as of Friday to aid the gang-fighting force in the search.

— Jacqueline Charles, Miami Herald, 25 Oct. 2026
The arc of Bradley Whitford’s career makes for a grim report card on the state of the country.

— David Mack, CNN Money, 25 Oct. 2026

Definition of grim

Adjective

Meanwhile, waiting in the wings is a man of few words — and initially, few feelings, or so thinks Marianne — the steadfast Colonel Brandon (Herbert Nordrum).

— ABC News, ABC News, 14 Oct. 2026
The poem continues with more verses about Burns’s steadfast love, but beyond that, nothing really happens.

— René Ostberg, Encyclopedia Britannica, 14 Oct. 2026

Definition of steadfast

Adjective

The overwhelming problem of plastic From flax that can be used in clothing and cars to robotic skimmers to stricter laws, determined researchers, activists and volunteers fight an industry intent on making more plastic.

— Michael Hawthorne, Chicago Tribune, 22 Oct. 2026
That witness said Foss left a cellphone behind after their interaction, which was later determined to have belonged to Lussier.

— Stephen Swanson, CBS News, 22 Oct. 2026

Definition of determined

Adjective

Those capabilities could help address a persistent challenge in counter-drone warfare.

— Aamir Khollam, Interesting Engineering, 24 Oct. 2026
This cycle of price increases serves not only to offset immediate fuel price spikes, but also to make up for unadjusted pricing power lost in recent years due to flight overcapacity, fare suppression, and persistent inflation.

— , CNBC, 23 Oct. 2026

Definition of persistent

Browse Nearby Words

implacability

implacable

implant

See all Nearby Words

Cite this Entry

Style

“Implacable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/implacable. Accessed 27 Oct. 2026.

Copy Citation

Synonyms of implacable

adjective

Example Sentences

Browse Nearby Words

Podcast

Cite this Entry

More from Merriam-Webster

Word of the Day

milieu

Popular in Grammar & Usage

How to Use 'Who' vs. 'Whom'

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

'Affect' vs. 'Effect'

'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

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

12 Lovely and Unusual Words for the Natural World

Why do we 'bury the lede?'

'Za' and 9 Other Words to Help You Win at SCRABBLE

Popular

How to Use 'Who' vs. 'Whom'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Games & Quizzes