unassailable

adjective

un·​as·​sail·​able ˌən-ə-ˈsā-lə-bəl How to pronounce unassailable (audio)
: not assailable : not liable to doubt, attack, or question
an unassailable argument
an unassailable alibi
unassailability noun
unassailableness noun
unassailably adverb

Examples of unassailable in a Sentence

one of the unassailable beliefs of that political party
Recent Examples on the Web
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.
The fact that a Chinese company managed the feat, despite all the export restrictions for advanced tech in place, rocked global financial markets that were betting the U.S. had an unassailable AI lead. Arjun Kharpal, CNBC, 11 Aug. 2025 Coupled with his gains in both the race’s individual time trials, that effectively gave Pogačar an unassailable lead with a week still to race. Issy Ronald, CNN Money, 27 July 2025 That aphorism of his is so solid, so unassailable, and so universal, that all leadership theory and practice springs forth from it. Eli Amdur, Forbes.com, 27 June 2025 The task was immense: to select a new presidential nominee from a field that had largely cleared out to accommodate Trump's seemingly unassailable path. Theo Burman, MSNBC Newsweek, 13 July 2025 See All Example Sentences for unassailable

Word History

First Known Use

1596, in the meaning defined above

Time Traveler
The first known use of unassailable was in 1596

Browse Nearby Words

Cite this Entry

“Unassailable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unassailable. Accessed 4 Sep. 2025.

Kids Definition

unassailable

adjective
un·​as·​sail·​able ˌən-ə-ˈsā-lə-bəl How to pronounce unassailable (audio)
: not assailable : not open to doubt, attack, or question
unassailably adverb

More from Merriam-Webster on unassailable

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!