Mistakingly or Mistakenly: Which Is Correct? has made you pause after you typed a word, you are not alone. Many people, even native speakers, have typed “mistakingly”, wondered if the spelling was correct, then typed “mistakenly” because it looked right. This difference between the two words seems logical, may sound familiar, and often creates confusion. In modern English and standard English, mistakenly is the widely accepted, accepted spelling, correct form, right choice, and standard spelling, while mistakingly is an incorrect form, extremely uncommon, normally not considered correct. From my own editing experience, this is one of the common mistakes I always look for because it can easily appear believable.
The difference comes down to word formation in English grammar. The verb is mistake, the adjective is mistaken, and the adverb is mistakenly. Although mistakingly may exist in older or rare use, it remains uncommon in modern English and is not the correct choice for everyday English usage. This grammar guide explains the grammar difference, spelling difference, correct usage, usage examples, spelling rules, and meanings so readers, learners, and writers can understand the best choice of each word and words with greater confidence during language learning.
Imagine a student who wrote an email to a teacher, attached the wrong file, and accidentally used mistakingly incorrectly. The teacher replied politely and corrected the small mistake. This example highlights the verb mistake, adjective mistaken, and adverb mistakenly through practical examples of English language usage. If you search online for mistakingly or mistakenly or compare mistakingly vs mistakenly, these easy tricks will help you remember, remember spelling, learn, and write with the right spelling by understanding what is behind the rules, why both forms look convincing, and why only one is accepted and correct.
Mistakingly or Mistakenly: Which One Is Correct?
The correct spelling is mistakenly.
When you want to describe an action that happened because of an error, misunderstanding, or incorrect belief, use mistakenly.
Correct examples:
- I mistakenly deleted the important file.
- She mistakenly believed the meeting started at 3 p.m.
- The package was mistakenly delivered to the wrong address.
- He mistakenly called the wrong number.
Incorrect example:
- I mistakingly deleted the important file.
Although many readers will understand what you mean, mistakingly sounds unnatural because it does not follow standard English usage.
What Does Mistakenly Mean?
Mistakenly is an adverb that means doing something because of a mistake, misunderstanding, or incorrect assumption.
It describes an action that happens when someone believes something is true when it is actually false.
The word usually suggests that the person did not intend to make the error.
For example:
Sarah mistakenly sent the email to the wrong customer.
This means Sarah did not purposely send the email to the wrong person. She made an error.
Another example:
The employee mistakenly entered the wrong information into the system.
The employee made a mistake while completing a task.
Mistakenly Word Formation Explained
Understanding how English builds words makes the difference between mistakingly and mistakenly much clearer.
The word develops like this:
Mistake
↓
Mistaken
↓
Mistakenly
Breakdown:
| Word | Type | Meaning |
| Mistake | Noun/Verb | An error or an incorrect action |
| Mistaken | Adjective | Being wrong or incorrect |
| Mistakenly | Adverb | Doing something incorrectly because of an error |
The key point is that mistakenly comes from “mistaken,” not directly from “mistake.”
This pattern appears in many English words.
For example:
| Adjective | Adverb |
| Correct | Correctly |
| Incorrect | Incorrectly |
| Different | Differently |
| Mistaken | Mistakenly |
English does not always build words in perfectly predictable ways. That’s why directly adding endings can sometimes create forms that sound reasonable but are not correct.
Is Mistakingly a Word?
The short answer: mistakingly is not considered standard English.
You may occasionally find it used online or in informal writing. However, dictionaries and professional writing standards generally favor mistakenly.
This happens often in English. People create words by following patterns that seem logical.
For example:
- Mistake → Mistaking → Mistakingly
At first glance, that construction looks reasonable. After all, English has many words ending in -ing and -ly.
However, language does not always work like a mathematical formula.
A word can look correct but still feel wrong to native speakers.
Think of it like building a key:
You might have a key-shaped piece of metal, but if the cuts are wrong, it still won’t open the lock.
“Mistakingly” has the right shape, but “mistakenly” is the key that fits.
Why Do People Write Mistakingly Instead of Mistakenly?
The confusion between mistakingly or mistakenly happens for several reasons.
People Add “-ly” to the Wrong Form
Many people assume:
Mistake + ing + ly = Mistakingly
This seems logical because mistaking is a real word.
For example:
- I am mistaking one person for another.
The problem is that the adverb describing an incorrect action does not come from mistaking.
It comes from mistaken.
The correct structure is:
Mistaken + ly = Mistakenly
Mistaking and Mistaken Have Different Meanings
Although they look similar, these words perform different jobs.
Mistaking
Mistaking means confusing one thing with another.
Example:
I am mistaking him for his brother.
This means you are confusing two people.
Mistaken
Mistaken means being wrong.
Example:
I was mistaken about the schedule.
This means your information was incorrect.
Mistakenly
Mistakenly describes an action caused by being wrong.
Example:
I mistakenly checked the wrong date.
Mistakenly vs Mistakingly: Grammar Comparison
| Word | Correct? | Meaning | Example |
| Mistakenly | ✅ Yes | Done because of an error | She mistakenly deleted the message. |
| Mistakingly | ❌ Not recommended | Uncommon and unnatural | She mistakingly deleted the message. |
The difference is not about pronunciation. Both forms may sound similar when spoken quickly.
The difference is about standard word formation.
How to Use Mistakenly Correctly in a Sentence
The word mistakenly usually appears near the verb because it explains how the action happened.
Pattern: Subject + Mistakenly + Verb
Examples:
- He mistakenly entered the wrong password.
- She mistakenly removed the file.
- They mistakenly booked the wrong hotel.
Pattern: Subject + Verb + Object + Mistakenly
Examples:
- I sent the report to the wrong person mistakenly.
- The customer paid the invoice twice mistakenly.
However, placing mistakenly before the verb usually sounds more natural.
Compare:
✅ I mistakenly deleted the photo.
⚠️ I deleted the photo mistakenly.
Both can work, but the first sounds more natural in everyday English.
Pattern: Was/Were + Mistakenly + Past Participle
This structure is common in formal writing.
Examples:
- The account was mistakenly charged.
- The document was mistakenly removed.
- The information was mistakenly shared.
You will often see this pattern in:
- Business emails
- News reports
- Technical explanations
- Customer service messages
Common Mistakes With Mistakenly
Using Mistakingly Instead of Mistakenly
This is the biggest mistake.
Incorrect:
The package was mistakingly sent to the wrong address.
Correct:
The package was mistakenly sent to the wrong address.
Confusing Mistakenly With Accidentally
These words often overlap, but they focus on different ideas.
Mistakenly focuses on an error in judgment.
Example:
I mistakenly thought the store was closed.
The problem came from incorrect information.
Accidentally focuses on something happening unintentionally.
Example:
I accidentally dropped my phone.
The problem happened without planning.
Comparison:
| Word | Main Idea | Example |
| Mistakenly | Wrong belief or decision | I mistakenly chose the wrong option. |
| Accidentally | No intention | I accidentally spilled water. |
| Incorrectly | Not done properly | He answered incorrectly. |
Mistakenly vs Accidentally vs Incorrectly: Detailed Comparison
These three words often appear in similar situations, but their meanings are slightly different.
| Word | Meaning | Example |
| Mistakenly | Because of misunderstanding or wrong information | She mistakenly identified the person. |
| Accidentally | Without planning or intention | She accidentally broke the glass. |
| Incorrectly | In a wrong way according to facts or rules | He incorrectly calculated the answer. |
Example Scenario
Imagine someone enters the wrong address while ordering food.
Mistakenly:
I mistakenly entered my old address.
The person believed the address was correct.
Accidentally:
I accidentally clicked the wrong address.
The person made an unplanned click.
Incorrectly:
I entered the address incorrectly.
The information was wrong.
Real-Life Examples of Mistakenly
The word mistakenly appears in everyday conversations, workplaces, technology, and official communication.
Technology Examples
Digital mistakes happen constantly.
Examples:
- I mistakenly deleted my photos.
- She mistakenly shared the private document.
- The system mistakenly blocked my account.
Technology companies often use this word when explaining errors.
Example:
Your payment was mistakenly declined.
This tells the customer that the problem happened because of an error.
Workplace Examples
Professional environments frequently use mistakenly.
Examples:
- The employee mistakenly attached the wrong file.
- The invoice was mistakenly sent twice.
- The manager mistakenly approved the incorrect request.
A simple word like mistakenly helps explain mistakes without suggesting bad intentions.
Everyday Conversations
People make small mistakes all the time.
Examples:
- I mistakenly wore my shirt backward.
- She mistakenly called me by another name.
- He mistakenly thought today was Friday.
These situations are common because humans rely on memory and assumptions.
Case Study: How One Word Changes Professional Communication
Imagine a company sends an incorrect invoice to a customer.
Poor communication:
We charged you wrong.
This sounds careless and unclear.
Better communication:
We mistakenly charged you twice due to a processing error.
The second sentence works better because it:
- Explains what happened
- Shows the mistake was unintentional
- Sounds professional
Word choice matters. A single adverb can change how a message feels.
Can You Ever Use Mistakingly?
In modern standard English, it is best to avoid mistakingly.
Even if some people understand the meaning, it may distract readers.
This is especially true in:
- Academic writing
- Professional documents
- Business emails
- Articles
- Resumes
Use:
✅ Mistakenly
Avoid:
❌ Mistakingly
Easy Trick to Remember Mistakenly
Remember this sentence:
“A mistake makes you mistaken, so you act mistakenly.”
The word path is:
Mistake
↓
Mistaken
↓
Mistakenly
Another memory trick:
Mistakenly contains “mistaken.”
That connection makes it easier to remember the correct spelling.
Synonyms for Mistakenly
Depending on the situation, you can replace mistakenly with other words.
| Synonym | Meaning | Example |
| Accidentally | Without intention | I accidentally deleted the file. |
| Wrongly | In an incorrect way | The person was wrongly accused. |
| Incorrectly | Not accurately | She incorrectly answered the question. |
| Erroneously | Because of an error | The data was erroneously recorded. |
| Unintentionally | Without planning | He unintentionally caused confusion. |
However, mistakenly remains one of the most natural choices in everyday English.
See also: Freshman or Freshmen Explained: Which Is Correct?
FAQs
1. Is mistakingly a real word?
Mistakingly has appeared in some older texts and informal writing, but it is not accepted as the standard spelling in modern English. Mistakenly is the correct form for almost all situations.
2. Why is mistakenly correct instead of mistakingly?
Mistakenly comes from the adjective mistaken, which forms the standard adverb. English grammar and major dictionaries recognize mistakenly as the correct spelling.
3. Can I use mistakingly in formal writing?
No. In academic, business, and professional writing, you should always use mistakenly to avoid spelling errors and maintain clear, standard English.
4. How can I remember the correct spelling?
A simple trick is to think of the phrase “I was mistaken.” Since the adjective is mistaken, the adverb naturally becomes mistakenly.
5. Do native English speakers confuse mistakingly and mistakenly?
Yes. Many native speakers and English learners type mistakingly because it looks logical. However, dictionaries and style guides recommend mistakenly as the correct spelling.
Conclusion
When comparing mistakingly and mistakenly, the correct choice is clear. Mistakenly is the standard, widely accepted spelling used in modern English, while mistakingly is considered nonstandard and should generally be avoided. Understanding how the word is formed from mistaken makes it easier to remember the correct version. Whenever you write emails, essays, reports, or everyday messages, choosing mistakenly will help you communicate more accurately and confidently.
