unfathomable
adjective
un·fath·om·able
ˌən-ˈfa-t͟hə-mə-bəl 
: not capable of being fathomed:
a
: immeasurable
… the unfathomable darkness of empty space.—
H. G. Wells
H. G. Wells
b
: impossible to comprehend
unfathomable motives/reasons
Examples of unfathomable in a Sentence
His behavior is completely unfathomable.
the unfathomable reaches of space
Recent Examples on the Web
Many aspects of the story read like a Hollywood script and are unfathomable to the average American.
—Madeline Mitchell, USA Today, 5 Feb. 2026
There’s no way of knowing this frigid February how all these players and coaches will work out, but to get this much done in this short a time certainly shows high-level energy, high-level organization, unfathomable relentlessness.
—Dom Amore, Hartford Courant, 4 Feb. 2026
Her death has left a deep unfathomable pain in her family, her aunt said, as the country reckons with the aftermath of weeks of anti-regime protests during which government forces killed thousands, according to activists.
—Sarah Baniak, ABC News, 3 Feb. 2026
The steely husks stood sentinel over unfathomable loss for weeks or months until they were towed away and sold as scrap.
—Marah Eakin, Los Angeles Times, 26 Jan. 2026
See All Example Sentences for unfathomable
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Madeline Mitchell, USA Today, 5 Feb. 2026
There’s no way of knowing this frigid February how all these players and coaches will work out, but to get this much done in this short a time certainly shows high-level energy, high-level organization, unfathomable relentlessness.
—Dom Amore, Hartford Courant, 4 Feb. 2026
Her death has left a deep unfathomable pain in her family, her aunt said, as the country reckons with the aftermath of weeks of anti-regime protests during which government forces killed thousands, according to activists.
—Sarah Baniak, ABC News, 3 Feb. 2026
The steely husks stood sentinel over unfathomable loss for weeks or months until they were towed away and sold as scrap.
—Marah Eakin, Los Angeles Times, 26 Jan. 2026
See All Example Sentences for unfathomable
Cite this Entry
“Unfathomable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfathomable. Accessed 9 Feb. 2026.
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unfathomable
adjective
un·fath·om·able
ˌən-ˈfat͟h-ə-mə-bəl
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