as in durable
not able to be broken
The two of them had an unbreakable bond of friendship. The plastic is virtually unbreakable.
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Recent Examples of unbreakable
Make Food and Water Accessible A constant supply of fresh water in an unbreakable bowl is a must.
—
Kathy Barnes, Better Homes & Gardens, 17 June 2025
Already Nearly ten months later, the bond between the woman and the dog was unbreakable.
—Ashley Vega, People.com, 13 June 2025
Harrison’s unbreakable spirit has been visible in the build to her title fight at UFC 316, which takes place at the Prudential Center in Newark, N.J.
—Justin Barrasso, Boston Herald, 7 June 2025
Based on Heisenberg’s uncertainty principle and the quantum no-cloning theorem, QKD systems theoretically enable unbreakable security.
—Vibhu Sharma, Forbes.com, 11 June 2025
See All Example Sentences for unbreakable
Kathy Barnes, Better Homes & Gardens, 17 June 2025
Already Nearly ten months later, the bond between the woman and the dog was unbreakable.
—Ashley Vega, People.com, 13 June 2025
Harrison’s unbreakable spirit has been visible in the build to her title fight at UFC 316, which takes place at the Prudential Center in Newark, N.J.
—Justin Barrasso, Boston Herald, 7 June 2025
Based on Heisenberg’s uncertainty principle and the quantum no-cloning theorem, QKD systems theoretically enable unbreakable security.
—Vibhu Sharma, Forbes.com, 11 June 2025
See All Example Sentences for unbreakable
Recent Examples of Synonyms for unbreakable
Adjective
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Additionally, acrylic and fiberglass are not as durable as cast iron and can scratch more easily.—
Daley Quinn,
Southern Living,
20 July 2025
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Whether foam ends up dominating the pickleball market remains to be seen, but people who play nearly every day will also appreciate that this paddle uses an aramid carbon fiber face that is more durable than raw carbon and that the foam absorbs more vibration.—
Martin Cizmar,
Wired News,
20 July 2025
Adjective
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Purpose That Carries Forward The most enduring purpose is not one that is declared.—
Vibhas Ratanjee,
Forbes.com,
19 July 2025
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Letterman’s 22-year tenure yielded some of late-night TV’s most enduring musical moments.—
Walden Green,
Pitchfork,
18 July 2025
Adjective
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The big question, though, is how the art stays permanent when a simple shake of the device erases the image on the gray screen.—
Mark Gray,
People.com,
24 July 2025
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With more than 4,000 animals and over 25 permanent and special exhibits, there is much to appreciate about Texas's largest aquarium.—
Gabi De la Rosa,
Southern Living,
24 July 2025
Cite this Entry
“Unbreakable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unbreakable. Accessed 30 Jul. 2025.
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