Past Tense of Sneak
Current authoritative evidence supports both sneaked and snuck. Cambridge presents “sneaked” and labels “snuck” as US also; Merriam-Webster records both inflections. Preserve that source-specific regional note instead of inventing a universal right/wrong, formality, or frequency ranking.
Both “sneaked” and “snuck” are documented past-tense and past-participle forms of “sneak.” Cambridge marks “snuck” as “US also,” while Merriam-Webster records both forms.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| past tense: form documented by both reviewed authorities | sneaked | Use “sneaked.” |
| past tense: Cambridge “US also” variant | snuck | “Snuck” is also documented, with Cambridge marking it US also. |
| past participle | sneaked or snuck | Both forms are documented for the participle. |
| present participle | sneaking | Use “sneaking.” |
Quick tests
Verb-form test
Are you choosing between “sneaked” and “snuck” for a past form of “sneak”?
If yes: Both are documented; preserve the regional/style convention relevant to your context.
If no: Use “sneak” for the base/present form or “sneaking” for the present participle when a past form is not required.
Caveat: Cambridge’s “US also” label is a real regional boundary; it should not be rewritten as a universal correctness or frequency claim.
Examples
She sneaked out before sunrise.
“Sneaked” is a documented simple-past form.
He snuck out before the meeting ended.
“Snuck” is documented; Cambridge marks it as US also.
They had sneaked through the side entrance earlier.
“Sneaked” is a documented past participle after “had.”
Further guidance
Core difference
Use “sneaked” as a documented past form in general English; “snuck” is also documented, with Cambridge explicitly marking it as US also.
Fast Test
If your style or regional context matters, follow the convention required by that context; the reviewed evidence does not justify calling either documented form universally wrong.
Usage Boundary
Do not manufacture a universal preference hierarchy. The evidence supports both forms and gives a specific regional note for “snuck.”
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- SNEAK Definition & Meaning - Merriam-Webster (opens in a new tab)Merriam-Webster · Merriam-Webster records both sneaked and snuck and says snuck is now common and standard.
- Sneak — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Past forms “sneaked” and US also “snuck”