1
as in certain
having been established and usually not subject to change
hard-and-fast rules that governed the corporate environment in those days included strictures regarding office dress that were rigidly enforced
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in unchangeable
not capable of changing or being changed
hard-and-fast beliefs that are the rock-solid foundation of their religion
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of hard-and-fast
One hard-and-fast rule to live by in this case?
—
Stacia Datskovska, Footwear News, 26 Jan. 2026
But even in the absence of hard-and-fast rules and guardrails on how AI can be used in schools, education policymakers identified a number of ethical concerns raised by the technology’s spread, including student safety, data privacy and negative impacts on student learning.
—Janice Mak, The Conversation, 22 Jan. 2026
Don’t miss Mardi Gras King Cake There’s a hard-and-fast rule in New Orleans.
—Jenny Adams, AFAR Media, 30 Dec. 2025
This was my hard-and-fast belief — up until the trailer for The Sheep Detectives was released on December 18.
—Fran Hoepfner, Vulture, 18 Dec. 2025
See All Example Sentences for hard-and-fast
Stacia Datskovska, Footwear News, 26 Jan. 2026
But even in the absence of hard-and-fast rules and guardrails on how AI can be used in schools, education policymakers identified a number of ethical concerns raised by the technology’s spread, including student safety, data privacy and negative impacts on student learning.
—Janice Mak, The Conversation, 22 Jan. 2026
Don’t miss Mardi Gras King Cake There’s a hard-and-fast rule in New Orleans.
—Jenny Adams, AFAR Media, 30 Dec. 2025
This was my hard-and-fast belief — up until the trailer for The Sheep Detectives was released on December 18.
—Fran Hoepfner, Vulture, 18 Dec. 2025
See All Example Sentences for hard-and-fast
Recent Examples of Synonyms for hard-and-fast
Adjective
-
DeGette is one of 45 members of the Democratic caucus on the litigation task force, which files legal motions and amicus briefs to support and challenge certain efforts in the courts.—
Elliott Wenzler,
Denver Post,
31 May 2026
-
Kateryna Bondar, a senior fellow with the Wadhwani AI Center at CSIS, told CNBC that humanoid robots could theoretically provide certain upsides on the battlefield due to their autonomy and human-like dexterity.—
Dylan Butts,
CNBC,
30 May 2026
Adjective
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Families can also create irrevocable trusts to remove countable assets towards Medicaid qualification, but remember, irrevocable trusts are usually unchangeable.—
Medora Lee,
USA Today,
9 May 2026
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Policies Vary by Location As generous as Aldi’s approach can be, there are a few places where the rules are solid and unchangeable.—
Jessica Safavimehr,
Southern Living,
22 Apr. 2026
Adjective
-
These advanced technologies ensure the router maintains a high data throughput and more stable performance, even when in a congested network.—
Mark Sparrow,
Forbes.com,
31 May 2026
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An outcome would be more stable and adaptable behavior of the rover in granular environments.—
Leonard David,
Space.com,
31 May 2026
Adjective
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The game’s newest major champion represents a refreshing and unchanging sense of self, bred by memories like those back in Wolverhampton, England.—
Gabby Herzig,
New York Times,
18 May 2026
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Through some creative circuitry, chip-scale EPR reverses this setup—using a simple magnet to create an unchanging field and sweeping through a band of oscillation frequencies.—
IEEE Spectrum,
IEEE Spectrum,
30 Apr. 2026
Adjective
-
Arsenal fans flock to final Few people understand Arsenal’s global fanbase like Smith – a man who has fostered a community of listeners from around the world from his home in the United States.—
Ben Church,
CNN Money,
30 May 2026
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Ogwumike’s clutch shot was needed because the Sparks (4-3) squandered an eight-point lead in the final 4½ minutes.—
Daily News,
Daily News,
30 May 2026
Adjective
-
Without such a measure, the trick becomes too easy—stop the IRS from finishing the audit, declare there was no fixed debt, and walk away having avoided both the tax and the tax consequences of forgiveness.—
Andrew Leahey,
Forbes.com,
29 May 2026
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At that age, there's typically a little more financial certainty, as many retirees are claiming their maximum Social Security benefit and have adjusted to living on a fixed income.—
Angelica Leicht,
CBS News,
28 May 2026
Adjective
-
Getting warships into the water is hard enough without wasting funds on vessels unlikely ever to sail.—
Editorial,
Boston Herald,
30 May 2026
-
Hulst setting a hard pace from the gun with Serna trying to hold on long enough to outkick him in the end.—
Scott M. Reid,
Oc Register,
30 May 2026
Cite this Entry
“Hard-and-fast.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hard-and-fast. Accessed 6 Jun. 2026.
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