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
To me, a world without birds is simply unfathomable.
—ABC News, 26 Feb. 2026
The beads are increasingly viewed as a problem, but a Mardi Gras without beads also seems unfathomable.
—Travis Loller, Arkansas Online, 16 Feb. 2026
Losing to the United States and Russia was one thing, but losing to Slovenia, a tiny nation with just one NHL player on the roster, was almost unfathomable.
—Mark Lazerus, New York Times, 14 Feb. 2026
Instead, the trio is grappling with an unfathomable crime story that hits close to home.
—Brian Steinberg, Variety, 10 Feb. 2026
See All Example Sentences for unfathomable
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ABC News, 26 Feb. 2026
The beads are increasingly viewed as a problem, but a Mardi Gras without beads also seems unfathomable.
—Travis Loller, Arkansas Online, 16 Feb. 2026
Losing to the United States and Russia was one thing, but losing to Slovenia, a tiny nation with just one NHL player on the roster, was almost unfathomable.
—Mark Lazerus, New York Times, 14 Feb. 2026
Instead, the trio is grappling with an unfathomable crime story that hits close to home.
—Brian Steinberg, Variety, 10 Feb. 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 1 Mar. 2026.
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unfathomable
adjective
un·fath·om·able
ˌən-ˈfat͟h-ə-mə-bəl
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