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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
a unfathomable
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a unfathomable" is not correct in written English. It should be "an unfathomable" because "unfathomable" begins with a vowel sound. You can use it to describe something that is difficult or impossible to understand. Example: "The depths of the ocean are an unfathomable mystery." Alternative expressions include "an incomprehensible" and "an inscrutable."
⚠ May contain grammatical issues
News & Media
Wiki
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
Perishing from a fire is an unfathomable death.
News & Media
A dream, and an unfathomable desire to achieve that dream, are the two basic aspects needed to succeed in business.
Wiki
With naught but a moustache comb and an unfathomable accent he's managed to get himself a couple of punch-ups away from Warden of the North.
News & Media
All agreed that the exclusion of such a top team was an unfathomable snub.
News & Media
They fell out after an unfathomable row over a joke about Stalinism.
News & Media
In Greece, unemployment rocketed an unfathomable 18.3percentt in a span of four years.
News & Media
Later the death toll is updated to an ungraspable 58 and an unfathomable total of 42 guns, all legally purchased.
News & Media
This is a university summer ball, with an unfathomable dress code.
News & Media
He won 10 national championships in 12 years, including 7 in a row, as U.C.L.A.'s coach, an unfathomable number today.
News & Media
More often the public is benumbed by an unfathomable depth of detail and a perplexing array of claims.
News & Media
For some, it represents an unfathomable hurdle; for others, it presents a challenge to discover, unravel and find out more.
Wiki
Expert writing Tips
Best practice
Always use the article 'an' before the word 'unfathomable'. Because the word begins with a vowel sound (/ʌ/), the correct indefinite article must be 'an' to allow for smooth phonetic transition.
Common error
Do not assume that all words starting with 'u' take the article 'a'. While words like 'university' start with a consonant 'y' sound, 'unfathomable' starts with a pure vowel sound. Using "a unfathomable" is a common error that disrupts the flow of a sentence.
Linguistic Context
The sequence "a unfathomable" functions as a failed attempt at an indefinite article and adjective pairing. In standard English, this construction is intended to modify a singular countable noun. However, as noted by Ludwig, the phonetic requirement for 'an' makes this specific string non-standard and strictly incorrect in formal writing.
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Ludwig's WRAP-UP
The phrase "a unfathomable" is a grammatical error and should always be written as "an unfathomable". According to Ludwig AI and the provided search data, there are no documented instances of the incorrect version in reliable publications. The word 'unfathomable' begins with a vowel sound, which necessitates the use of 'an'. This adjective is commonly used in high-level media to describe things that are mysterious, vast, or impossible to understand. When writing, prioritize the phonetic flow and ensure that the indefinite article matches the sound of the following word.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
an unfathomable
Uses the correct indefinite article for a word starting with a vowel sound
an incomprehensible
Replaces the adjective with a synonym starting with a vowel sound and correct article
a deep
Uses a simple adjective starting with a consonant to keep the article a
an inscrutable
Suggests something that cannot be searched or understood, using the correct article
a mysterious
Provides a common synonym starting with a consonant to match the article a
an immeasurable
Focuses on the aspect of depth or scale that cannot be measured
an enigmatic
Describes something puzzling or difficult to interpret with proper article usage
a bottomless
Employs a metaphorical synonym that works with the article a
an unintelligible
Refers specifically to things that cannot be understood logically
a profound
Swaps for a consonant-led adjective meaning deep or intense
FAQs
Which is correct, a unfathomable or an unfathomable?
The only correct version is "an unfathomable". In English, the article 'an' is required before words that begin with a vowel sound.
What can I say instead of a unfathomable?
You should use "an unfathomable" or choose a similar phrase like "a mysterious" or "an incomprehensible" depending on your specific meaning.
Why is a unfathomable considered incorrect?
It is incorrect because it pairings the article 'a' with a word starting with the vowel sound /ʌ/. Standard English grammar dictates that 'an' must be used in this context to prevent a glottal stop.
How to use an unfathomable in a sentence?
You can use it to describe something beyond comprehension, such as "an unfathomable mystery" or "an unfathomable depth".
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