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
The Balcony is textbook Manet—grand in ambition, ingeniously composed, visually charismatic, and socially unfathomable.
—Susan Tallman, The New York Review of Books, 25 Apr. 2026
There is a scene in the big-budget biopic Michael that perfectly encapsulates Michael Jackson’s historically unfathomable fame and crushing, fragile psyche.
—Keith Murphy, VIBE.com, 24 Apr. 2026
The top leagues are where the biggest clubs play – think Manchester United and Bayern Munich – with rosters of global superstars who are paid unfathomable wages.
—Tribune Content Agency, Baltimore Sun, 16 Apr. 2026
In recent years, extreme weather events have caused unfathomable economic damage, and those costs are passed on to homeowners, renters, and small businesses through higher rates for insurance.
—Scott Wiener, Oc Register, 12 Apr. 2026
See All Example Sentences for unfathomable
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Susan Tallman, The New York Review of Books, 25 Apr. 2026
There is a scene in the big-budget biopic Michael that perfectly encapsulates Michael Jackson’s historically unfathomable fame and crushing, fragile psyche.
—Keith Murphy, VIBE.com, 24 Apr. 2026
The top leagues are where the biggest clubs play – think Manchester United and Bayern Munich – with rosters of global superstars who are paid unfathomable wages.
—Tribune Content Agency, Baltimore Sun, 16 Apr. 2026
In recent years, extreme weather events have caused unfathomable economic damage, and those costs are passed on to homeowners, renters, and small businesses through higher rates for insurance.
—Scott Wiener, Oc Register, 12 Apr. 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 28 Apr. 2026.
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unfathomable
adjective
un·fath·om·able
ˌən-ˈfat͟h-ə-mə-bəl
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