English spelling can be tricky, especially when two versions of a word look almost identical. Successfully and succesfully are a good example. Many English learners accidentally leave out one of the letters in the middle because the word is long and its pronunciation does not clearly reveal every letter. However, only one spelling is correct in standard English. Understanding the difference is useful for students, job applicants, writers, and anyone who wants to communicate professionally. In this guide, we will explain successfully vs succesfully, show the correct spelling, explore its meaning and origin, and provide simple examples and memory tricks to help you avoid this common spelling mistake.
Why “Successfully” and “Succesfully” Are Confusing
The words successfully and succesfully are confusing because they are extremely similar. In fact, the second form is simply a common misspelling of the first.
Similar pronunciation
When people say successfully quickly, the individual letters are not easy to hear. This can make learners unsure about how many cs and ss should appear in the written word.
Similar spelling
Both forms contain the same basic letters:
- success
- succes
The difference becomes noticeable in the middle of the word. The correct spelling contains “cc” in success and “ss” before the final -fully.
Context confusion
Because succesfully looks familiar and is easy to understand, readers can usually recognize what the writer means. However, recognizing a misspelled word does not make the spelling correct.
For example:
- Correct: She successfully completed the project.
- Incorrect: She succesfully completed the project.
Common learner mistakes
A frequent mistake is remembering only one c in the base word:
succesfully ❌
Instead, remember the correct base word:
success + fully = successfully ✅
Successfully vs Succesfully Explained Simply
Simple explanation
Successfully is the correct spelling. It is an adverb meaning in a successful way or with the desired result.
Succesfully is not a standard English spelling. It is a common misspelling of successfully.
One-line distinction
Successfully is correct; succesfully is incorrect.
Example sentences
- She successfully completed her English examination.
- The team successfully solved the problem.
The second spelling should not be used in formal or standard English writing.
Understanding Homophones in English
What Are Homophones?
Homophones are words that sound the same or nearly the same but have different spellings and meanings.
For example:
- right — correct or opposite of left
- write — to put words on paper
These words can cause problems because pronunciation alone does not always tell you which spelling to use.
However, successfully and succesfully are not homophones. They are simply two spellings that look similar, with succesfully being an incorrect spelling.
Why Homophones Cause Confusion
English spelling does not always perfectly match pronunciation. As a result, learners may spell a word based on how it sounds.
For example, someone may hear a word and write it according to the sounds they recognize. With a long word such as successfully, this can lead to missing or misplaced letters.
Learning the correct spelling of frequently used words is therefore important.
What Does “Successfully” Mean?
Definition and Core Meaning
Successfully is the correct spelling and is an adverb.
It means:
In a successful way; with the intended or desired result.
The word comes from the adjective successful, which comes from the noun success.
For example:
- He successfully passed the interview.
- They successfully launched the new website.
- She successfully completed the training course.
In each sentence, successfully describes how an action was completed.
Origin and Historical Use
The word is built from success, successful, and the adverb-forming suffix -ly.
The noun success ultimately comes from Latin successus, meaning advancement, favorable outcome, or result. It entered English through French and developed into the modern word success.
From this word family, English developed:
- success — a favorable result
- successful — achieving a desired result
- successfully — in a successful manner
- unsuccessful — not achieving the desired result
Modern Usage and Synonyms
Today, successfully is common in everyday, academic, professional, and formal English.
Depending on the sentence, similar words include:
- effectively
- successfully
- satisfactorily
- efficiently
- favorably
- triumphantly
- as planned
These words are not always exact substitutes, so context matters.
Example sentences
- The students successfully completed the assignment.
- The company successfully entered a new market.
- She successfully finished the course.
- The doctor successfully treated the patient.
- He successfully solved the difficult puzzle.
What Does “Succesfully” Mean?
Definition and Core Meaning
Succesfully has no standard dictionary meaning as a correctly spelled English word. It is a misspelling of successfully.
If you intend to say that something happened with a successful result, use:
successfully ✅
Not:
succesfully ❌
Origin and Historical Context
Unlike successfully, succesfully is not a separate word with its own historical development. It usually appears because writers accidentally omit one of the letters in the correct spelling.
The mistake is understandable because successfully is a long word with several repeated letters.
Modern Usage and Synonyms
You may occasionally see succesfully in:
- informal online posts
- social media comments
- student writing
- typed messages
- websites containing spelling errors
However, its appearance does not make it an accepted spelling.
For professional writing, academic work, applications, and formal communication, always use successfully.
Example sentences
Succesfully should not be used in standard English sentences.
Instead, write:
- The application was successfully submitted.
- We successfully completed the task.
- She successfully passed the test.
Successfully vs Succesfully: Key Differences at a Glance
| Word | Part of Speech | Meaning | Example Context |
|---|---|---|---|
| Successfully | Adverb | In a successful way; with the desired result | He successfully completed the course. |
| Succesfully | Incorrect spelling | No standard meaning | ❌ Do not use this spelling. |
The easiest rule is simple: successfully is correct, while succesfully is incorrect.
How to Remember the Difference Between Successfully and Succesfully
Spelling successfully correctly becomes easier when you break it into smaller parts.
Memory Trick 1: Remember “success”
Start with the base word:
SUCCESS
Then add:
-FULLY
This gives:
SUCCESS + FULLY = SUCCESSFULLY
The key is not to lose either c or s.
Memory Trick 2: Think “success” first
If you know how to spell success, you already know the difficult part.
Compare:
- success
- successful
- successfully
All three keep the “cc” in the middle.
Memory Trick 3: Watch the double letters
The correct spelling contains:
successfully
Notice the two pairs:
- cc
- ss
This is the most useful visual clue.
One memorable example
She successfully succeeded because she remembered “success.”
This sentence connects success, succeeded, and successfully, helping you remember the spelling pattern.
Common Mistakes and Confusions
Mistake 1: Removing one “c”
Wrong:
The project was succesfully completed.
Correct:
The project was successfully completed.
Why?
The base word is success, which contains two cs.
Mistake 2: Writing “succesfully”
This is perhaps the most common error.
Wrong:
He succesfully finished the job.
Correct:
He successfully finished the job.
The correct spelling preserves the spelling of success.
Mistake 3: Confusing pronunciation with spelling
Because the word is often pronounced quickly, learners may not clearly hear every letter.
However, spelling should be based on the established written form, not simply on pronunciation.
Mistake 4: Using the misspelling in formal writing
A spelling error in a text message may go unnoticed, but it can be more noticeable in:
- CVs and resumes
- cover letters
- school assignments
- academic essays
- business emails
- websites
- official applications
Using successfully helps your writing look accurate and professional.
Examples Section: Correct and Incorrect Usage
Example 1
✔ Correct: She successfully completed her final examination.
✘ Incorrect: She succesfully completed her final examination.
Explanation: The correct adverb is successfully.
Example 2
✔ Correct: The company successfully launched its new product.
✘ Incorrect: The company succesfully launched its new product.
Explanation: The spelling must retain the double c and double s pattern from success.
Example 3
✔ Correct: He successfully applied for the position.
✘ Incorrect: He succesfully applied for the position.
Explanation: Succesfully is a spelling error, not an alternative form.
Example 4
✔ Correct: They successfully solved the technical problem.
✘ Incorrect: They succesfully solved the technical problem.
Explanation: Always write successfully with cc and ss.
Example 5
✔ Correct: We successfully completed the project on time.
✘ Incorrect: We succesfully completed the project on time.
Explanation: The correct word is formed from success + fully.
Self Assessment: Test Your Knowledge
Fill in each blank with the correct spelling.
- The students __________ completed their final project.
(successfully / succesfully) - She __________ passed the driving test.
(successfully / succesfully) - The team __________ reached its goal.
(successfully / succesfully) - The application was __________ submitted online.
(successfully / succesfully)
Take a moment to choose your answers before checking the answer section.
Self Assessment Answers
- successfully ✅
- successfully ✅
- successfully ✅
- successfully ✅
The answer is the same in every case because successfully is the only correct standard spelling.
FAQs About “Successfully and Succesfully”
1. Is “successfully” or “succesfully” correct?
Successfully is correct. Succesfully is a misspelling and should not be used in standard English.
2. How do you spell successfully correctly?
The correct spelling is:
successfully
A useful way to remember it is success + fully.
3. Why is “succesfully” wrong?
Succesfully is wrong because it leaves out one of the cs found in the base word success.
4. What does successfully mean?
Successfully means doing something in a successful way or achieving the intended result.
For example:
She successfully completed the assignment.
5. Is successfully an adverb?
Yes. Successfully is an adverb because it describes how an action happens.
For example:
He successfully completed the task.
Here, successfully describes how he completed the task.
6. What is the noun form of successfully?
The noun form is success.
The related word family includes:
- success — noun
- successful — adjective
- successfully — adverb
- succeed — verb
7. Does successfully have two c’s?
Yes. Successfully contains two consecutive cs in the middle:
successfully
It also contains two ss after the e:
successfully
Remembering both pairs makes the spelling easier.
Final Conclusion: Using “Successfully” and “Succesfully” Correctly
When choosing between successfully and succesfully, there is no difficult grammatical distinction to memorize. The important point is that successfully is the correct standard English spelling, while succesfully is simply a misspelling. Successfully is an adverb that means doing something in a successful way or achieving the intended result. You can use it in everyday conversations, academic writing, professional documents, emails, applications, and many other situations.
The best way to remember its spelling is to start with the word success. It contains two cs and two ss in the relevant part of the word. Then add -fully: success + fully = successfully. This simple word-building trick can prevent one of the most common spelling mistakes English learners make.
For example, write “She successfully completed the course,” not “She succesfully completed the course.” Once you connect successfully with its root word success, the spelling becomes much easier to recognize. Keep practicing by using the word in your own sentences, and soon successfully will become a natural part of your English vocabulary.
David Parker is a language researcher and content writer at WordClarity.com, specializing in English word meanings, comparisons, spelling differences, and usage guides. He creates easy-to-understand content that helps readers improve clarity and confidence in everyday English. His work focuses on making language learning simple, accurate, and practical.