Quick answer: Both “sneaked” and “snuck” are correct past tense forms of “sneak.” “Sneaked” is the traditional, formal choice preferred in edited writing, while “snuck” is an informal variant that has gained widespread acceptance in American English over the past century.
These two words confuse writers because English typically forms past tense by adding “-ed,” making “sneaked” the expected form. However, “snuck” emerged as an irregular variant in the late 1800s and has since become deeply embedded in everyday speech and informal writing, creating genuine uncertainty about which version to use.
| Term | Meaning / When to use | Example sentence |
|---|---|---|
| Sneaked | Traditional past tense of “sneak”; use in formal writing, academic papers, professional documents, and when you want the safest, most universally accepted form | “The investigator sneaked into the building before dawn to gather evidence.” |
| Snuck | Informal past tense of “sneak”; acceptable in casual conversation, fiction dialogue, informal emails, and creative writing where a conversational tone fits | “I snuck a cookie from the jar when nobody was looking.” |
When to use “sneaked”
“Sneaked” is the original, regular past tense form of the verb “sneak.” It follows the standard English pattern of adding “-ed” to create the past tense, just like “walk” becomes “walked” or “talk” becomes “talked.” “sneaked” has been the standard form since the word entered English in the 16th century, and it remains the preferred choice in formal contexts.
Use “sneaked” when you’re writing anything that requires a professional or academic tone. This includes research papers, business reports, cover letters, legal documents, news articles, and any communication where you want to project competence and attention to detail. If you’re submitting work to a traditional publisher, writing for a scholarly journal, or crafting a resume, “sneaked” is your safest bet.
Here are real-world examples showing when “sneaked” is the right choice:
Professional email correction: A job applicant wrote, “I snuck additional responsibilities into my role at the previous company,” which sounded casual and slightly odd. The corrected version, “I sneaked additional responsibilities into my role at the previous company,” maintains professionalism while describing the same proactive behavior.
Academic writing: “The researcher sneaked observation equipment into the habitat to study the animals’ natural behavior without human interference.”
News article: “The journalist sneaked past security to witness the protest firsthand, later filing a report that exposed the truth.”
I’ve edited hundreds of manuscripts over the years, and I consistently see “sneaked” in published novels, especially in narrative passages where the tone is serious or literary. When a character moves stealthily in a thriller or historical fiction, “sneaked” carries the weight and formality that matches the genre’s expectations.
When to use “snuck”
“Snuck” is the irregular past tense variant that emerged in American English during the late 19th century. Despite initial resistance from grammar purists, it has become thoroughly naturalized in informal speech and writing. Grammarly’s analysis of this word pair confirms that “snuck” is now widely accepted in casual contexts, particularly in American English, though it still carries an informal register that makes it unsuitable for formal writing.
Use “snuck” when you’re writing dialogue, texting friends, posting on social media, writing creative fiction with a contemporary or conversational voice, or crafting marketing copy that aims for a relatable, down-to-earth tone. It’s the word people actually say in everyday conversation, which is why it sounds natural in dialogue and informal narratives. For more, see ‘Sneaked’ or ‘Snuck’: Which is correct?.
Here are practical examples showing “snuck” in action:
Text message to a friend: “I snuck out of the meeting early and grabbed coffee before anyone noticed I was gone.” This sounds natural and conversational, exactly how people talk.
Fiction dialogue: “‘I snuck a peek at your birthday present,’ she confessed with a guilty grin.” The informal “snuck” matches the casual, intimate tone of the conversation between friends.
Social media post: “Snuck in a quick workout before the kids woke up. Feeling accomplished!” The informal tone fits the platform and feels authentic.
In my experience editing contemporary fiction, “snuck” appears constantly in dialogue because it’s what real people say. A character in a modern romance novel would absolutely tell their best friend, “I snuck into his apartment to surprise him,” not “I sneaked into his apartment.” The irregular form sounds more natural and immediate in spoken language, which is precisely why it’s become so entrenched in informal usage.
How to remember the difference
Here’s a memory trick that actually works: Think of “sneaked” as the safe choice because both words start with “s” and end with a “k” sound, and “sneaked” has that formal “-ed” ending that signals proper grammar. When in doubt, default to “sneaked” — you’ll never be wrong.
For “snuck,” remember that it’s the sneaky word itself — it broke the rules by dropping the “-ed” ending and changing its vowel sound, just like someone sneaking around breaks the rules by moving quietly where they’re not supposed to be. The irregular form “snuck” is itself a rule-breaker, which makes it perfect for informal, rebellious, or casual contexts.
Here’s an editor-level insight that goes beyond simple memorization: When you’re reading your writing aloud, “snuck” will almost always sound more natural in dialogue because it’s shorter and has that punchy, one-syllable rhythm that matches how people actually speak. “Sneaked” has two syllables and can sound slightly stilted in conversation, which is why it belongs in narrative description and formal prose instead.
Another practical test: If you can replace the word with “crept” (another irregular past tense verb), “snuck” will likely fit the tone. If “crept” sounds too informal for your sentence, stick with “sneaked.”
Common mistakes and exceptions
The most frequent mistake I see is using “snuck” in formal business writing where it undermines the writer’s credibility. I once reviewed a cover letter for a senior financial analyst position that included the line, “I snuck cost-saving measures into the budget proposal.” While the candidate was trying to show initiative, the informal “snuck” made the accomplishment sound sneaky and unprofessional rather than strategic. Changing it to “sneaked” (or better yet, “integrated” or “implemented”) immediately elevated the tone. For more, see Sneaked or Snuck: Which Is Correct?.
Another common error is assuming that “snuck” is incorrect in all contexts. Some writers were taught that only “sneaked” is acceptable, and they rigidly apply this rule even in creative writing or dialogue where “snuck” would sound far more natural. This creates stilted, unnatural-sounding prose that distances readers from the story or message.
Regional differences matter here. “Snuck” is predominantly an American English phenomenon. In British English, Australian English, and other Commonwealth varieties, “sneaked” remains overwhelmingly dominant in both formal and informal contexts. If you’re writing for an international audience or a UK publisher, lean toward “sneaked” regardless of formality level.
One exception worth noting: In very formal legal or academic writing, some style guides recommend avoiding both “sneaked” and “snuck” entirely in favor of more precise verbs like “entered covertly,” “moved stealthily,” or “gained unauthorized access.” The verb “sneak” itself carries informal connotations that may not suit highly technical or legal documents.
The past participle confusion: Both “sneaked” and “snuck” can function as past participles (used with “have,” “has,” or “had”), though “sneaked” is more common in this role. You might write “I have sneaked into the building before” or “I had snuck out unnoticed,” but the latter sounds more informal. When using perfect tenses in formal writing, “sneaked” is the safer choice.
Frequently Asked Questions
Is “snuck” a real word? Yes, “snuck” is absolutely a real word recognized by all major dictionaries, including Merriam-Webster, Oxford English Dictionary, and Cambridge Dictionary. It’s an irregular past tense form of “sneak” that emerged in American English in the late 1800s and has gained full acceptance in informal contexts.
Which is more correct: sneaked or snuck? Neither is inherently “more correct” — both are grammatically acceptable. However, “sneaked” is preferred in formal writing and edited prose, while “snuck” is standard in informal speech and casual writing. If you need one answer that works everywhere, choose “sneaked.”
Can I use “snuck” in academic writing? No, you should avoid “snuck” in academic writing. Scholarly papers, dissertations, and research articles require formal language, and “sneaked” is the appropriate choice. Even better, consider whether a more precise academic verb like “entered covertly” or “conducted covert observation” would strengthen your writing.
Why do some people say “snuck” is wrong? Some people learned grammar rules before “snuck” gained widespread acceptance in the mid-to-late 20th century, or they were taught that only regular past tense formations are proper. While “snuck” faced resistance when it first emerged, modern dictionaries and style guides now recognize it as standard informal English, though the stigma persists among some traditionalists.
Steven Garcia has dedicated over a decade to exploring the intricacies of the English language, specializing in word comparisons and nuanced linguistic distinctions. Holding a master’s degree in Linguistics from the University of California, Steven has always been fascinated by the dynamic evolution of language. He began his career as an editor for several publishing houses, where he honed his skills in discerning subtle differences in word usage. Steven is particularly interested in the etymology and historical contexts that shape word meanings. His passion for language led him to join WhichWordHub, where he focuses on creating insightful content that helps readers understand the subtle differences between similar words. Through his work, Steven aims to enrich the vocabulary of language enthusiasts and empower them to make informed word choices. In addition to writing detailed articles, he enjoys engaging with the linguistic community to discuss the ever-evolving nature of English.