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Unsucessful vs. Unsuccessful — Which is Correct Spelling?

Edited by Tayyaba Rehman — By Fiza Rafique — Updated on April 1, 2024
"Unsucessful" is a common misspelling of the word "unsuccessful." "Unsuccessful" means not achieving the intended goal.
Unsucessful vs. Unsuccessful — Which is Correct Spelling?

Which is correct: Unsucessful or Unsuccessful

How to spell Unsuccessful?


Incorrect Spelling


Correct Spelling

Key Differences

Remember the base word "success" has two 'c's and two 's's.
Consider the word "success" + "ful", then add "un-" at the beginning.
Associate "unsuccessful" with phrases like "unsuccessful attempt" to reinforce the correct spelling.
"Un-" prefix means the opposite; don’t change the spelling of the root word.
A useful mnemonic might be: "Success" needs full effort, thus "successful."

How Do You Spell Unsuccessful Correctly?

Incorrect: Their unsucessful attempts did not deter them from continuing.
Correct: Their unsuccessful attempts did not deter them from continuing.
Incorrect: The attempt was unsucessful and they had to try again.
Correct: The attempt was unsuccessful and they had to try again.
Incorrect: Despite their efforts, the project was unsucessful.
Correct: Despite their efforts, the project was unsuccessful.
Incorrect: The team was unsucessful in winning the championship.
Correct: The team was unsuccessful in winning the championship.
Incorrect: He was unsucessful in securing the job he wanted.
Correct: He was unsuccessful in securing the job he wanted.

Unsuccessful Definitions

Unsuccessful denotes not achieving one's goal.
The team made an unsuccessful attempt at the championship.
Unsuccessful means not having the desired effect.
The treatment was unsuccessful.
Unsuccessful pertains to not thriving or prospering.
Several unsuccessful businesses closed their doors.
Unsuccessful signifies not resulting in success.
The product launch was unsuccessful.
Unsuccessful describes something that doesn't succeed.
An unsuccessful venture led to financial losses.
Having an unfavorable outcome
An unsuccessful venture.
Failing to attain something desired or intended
An unsuccessful entrepreneur.
Failed, not successful.
His unsuccessful attempt earned him sympathy, condolences, and an occasional good-natured ribbing.
Not successful; not producing the desired event; not fortunate; meeting with, or resulting in, failure; unlucky; unhappy.
Not successful; having failed or having an unfavorable outcome
Failing to accomplish an intended result;
An abortive revolt
A stillborn plot to assassinate the President

Unsuccessful Meaning in a Sentence

After several unsuccessful attempts, she finally solved the puzzle.
Despite a well-organized campaign, the referendum was unsuccessful.
His bid for reelection was unsuccessful, ending his political career.
The experiment was unsuccessful, requiring a review of the hypothesis.
The film was critically acclaimed but commercially unsuccessful.
The software update was unsuccessful and caused more issues.
The negotiations were unsuccessful, leading to a stalemate.
Their search for the missing artifact was unsuccessful.
The company's attempt to break into the new market was unsuccessful.
The rescue operation was difficult and, unfortunately, unsuccessful.
The startup was innovative but was unsuccessful in securing enough funding.
The team's efforts to develop a new product were unsuccessful.
They were unsuccessful in trying to prevent the leak from spreading.
Despite their enthusiasm, the event was poorly attended and unsuccessful.
He was unsuccessful in his attempt to set a new world record.
Their attempts to reconcile were sincere but ultimately unsuccessful.
They were unsuccessful in finding a solution that pleased everyone.
The peace talks were well-intentioned but unsuccessful.
Their efforts to clean up the spill were intensive but unsuccessful.
She was unsuccessful in her attempts to convince the board.
The mission was risky and, sadly, ended up being unsuccessful.
Her application to the university was unsuccessful.

Unsuccessful Idioms & Phrases

Prove unsuccessful

To end up not achieving the desired results or goals.
All strategies to increase sales prove unsuccessful in the face of market decline.

Ultimately unsuccessful

Describing an effort or endeavor that fails to achieve the desired outcome in the end.
The negotiations were intense but ultimately unsuccessful.

Historically unsuccessful

Having a record of not achieving success over a period of time.
The team has been historically unsuccessful, having not won a championship in decades.

Unsuccessful venture

A business or project that fails to achieve success or profitability.
After the unsuccessful venture into the restaurant business, they decided to focus on their original bakery.

Unsuccessful in every attempt

Failing in every try or effort made to achieve something.
They were unsuccessful in every attempt to mediate the conflict.

Unsuccessful bid

An attempt to win or achieve something that does not result in success.
The city's unsuccessful bid to host the Olympic Games was a disappointment to many.

Remain unsuccessful

To continue without achieving success despite efforts.
They remain unsuccessful in their attempts to find a suitable location for the new store.

Unsuccessful outcome

The result of an endeavor that does not meet its goals.
The project had an unsuccessful outcome, leading to its cancellation.

Unsuccessful run

A period of time during which attempts to achieve something fail.
After an unsuccessful run in politics, he returned to his career in law.

Common Curiosities

What is the pronunciation of unsuccessful?

The pronunciation is /ˌʌnsəkˈsɛsfəl/.

What is the root word of unsuccessful?

The root word is "success."

Why is it called unsuccessful?

It's termed "unsuccessful" because it denotes the opposite of achieving success.

Which vowel is used before unsuccessful?

The vowel 'u' is used.

What is the plural form of unsuccessful?

Adjectives in English don't typically have plural forms.

Is unsuccessful a negative or positive word?

It's a negative word.

Is unsuccessful a noun or adjective?

"Unsuccessful" is an adjective.

What is the verb form of unsuccessful?

The related verb is "succeed."

What is the singular form of unsuccessful?

"Unsuccessful" is an adjective and doesn't have a singular form.

Which article is used with unsuccessful?

Both "the" and "an" can be used, depending on the context.

Is unsuccessful a collective noun?

No, it isn't.

What is another term for unsuccessful?


What is the first form of unsuccessful?

Adjectives don’t have "forms" like verbs do, but the related verb "succeed" has "succeed" as its base form.

What is the third form of unsuccessful?

For the verb "succeed," the past participle is "succeeded."

Which preposition is used with unsuccessful?

Prepositions like "in," "at," or "with" can be used with "unsuccessful."

Which conjunction is used with unsuccessful?

"And" and "but" can be used.

Is unsuccessful an adverb?

No, it isn't.

Is unsuccessful an abstract noun?

No, it's an adjective.

How many syllables are in unsuccessful?

Four syllables.

What part of speech is unsuccessful?

"Unsuccessful" is an adjective.

What is the second form of unsuccessful?

For the verb "succeed," the past tense is "succeeded."

Is unsuccessful a vowel or consonant?

"Unsuccessful" is a word containing both vowels and consonants.

Is unsuccessful a countable noun?

It isn't a noun, so it's not countable.

Is the unsuccessful term a metaphor?

Not inherently, but it can be used metaphorically in context.

Is the word unsuccessful imperative?

No, it isn't.

What is a stressed syllable in unsuccessful?

The third syllable "cess" is stressed.

How is unsuccessful used in a sentence?

His attempt to climb the mountain was unsuccessful due to bad weather.

How do we divide unsuccessful into syllables?


What is the opposite of unsuccessful?


Which determiner is used with unsuccessful?

"An" or "the" can be used, depending on context.

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Author Spotlight

Written by
Fiza Rafique
Fiza Rafique is a skilled content writer at, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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