What does "unfathomable" mean?
Impossible to fathom.; Especially of depth: physically incapable of being measured; immeasurable.
Unfathomable
/(ˌ)ʌnˈfæðəməbl̩/ adj
adj ·Moderate ·High school level
Meaning at a glance
- Primary sense: Impossible to fathom.; Especially of depth: physically incapable of being measured; immeasurable.
- Grammar: unfathomable is listed as adj.
- Nearest alternatives: abysmal, abysmal, abyssal, abyssal.
- Useful contrasts: comprehensible, fathomable, lucid.
- Usage evidence: We are all so simple at heart that become unfathomable to one another.
How to use "unfathomable"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "unfathomable" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "unfathomable" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "unfathomable" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "unfathomable" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "unfathomable" is acting as adj in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "abysmal" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "unfathomable", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Adjective
- 1 Impossible to fathom.; Especially of depth: physically incapable of being measured; immeasurable.
"[W]e are not to make our eſtimate of the quantity of VVaters meerly by the Superficies of the Sea, but by its vaſt depth, vvhich in ſome places is unfathomable, and by thoſe vaſt ſubterraneous Receptacles of VVater vvhich pour themſelves out in ſeveral great Ebullitions and Marine Springs: […]"
- 2 Impossible to fathom.; Impossible to grasp the extent of, or to fully know or understand. figuratively
"The sheer number of warriors the enemy attacked with was unfathomable."
Adjective
- 1 incapable of being fully understood wordnet
- 2 resembling an abyss in depth; so deep as to be unmeasurable wordnet
- 3 of depth; not capable of being sounded or measured wordnet
Synonyms
All synonymsExample
"We are all so simple at heart that become unfathomable to one another."
Common questions
What is a synonym for "unfathomable"?
Common synonyms include: abysmal, abysmal, abyssal, abyssal, all comprehensive, all inclusive.
How do you use "unfathomable" in a sentence?
We are all so simple at heart that become unfathomable to one another.
How do you pronounce "unfathomable"?
Pronounced /(ˌ)ʌnˈfæðəməbl̩/.
Etymology
From un- (prefix meaning ‘not’) + fathom (“to measure the depth of (water); (figurative) to deeply understand (someone or something)”) + -able (suffix forming adjectives denoting things not able or fit to be done).