unbreakable
Britishadjective
Explanation
Something that can't be shattered, cracked, or easily destroyed is unbreakable. If your new cellphone is truly unbreakable, it will hold up no matter how many times you drop it on the floor. Use this adjective for anything that's physically durable, like the unbreakable glass used for car windshields or the unbreakable plastic bottles that ketchup comes in. It's impossible, or nearly impossible, to break these things. Things that are figuratively unbreakable can't be destroyed either, like the unbreakable bond between twins or the unbreakable secret code used by spies.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The shot of the car hurtling off the cliff is one of cinema’s most enduring images, illustrating unbreakable friendship, victory and freedom.
From Los Angeles Times • May 13, 2026
He warned this month that "any external aggressor will encounter an unbreakable resistance."
From Barron's • Mar. 29, 2026
A US physicist and a Canadian computer scientist have won this year's Turing Award for their invention of a form of seemingly unbreakable encryption.
From BBC • Mar. 18, 2026
That unbreakable bond was deepened further when Worcestershire won a dramatic One-Day Cup final against Hampshire at Trent Bridge in September.
From BBC • Dec. 31, 2025
For this reason, the Nazis considered Enigma unbreakable.
From "The Woman All Spies Fear" by Amy Butler Greenfield
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
