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sneak in

A2 informal separable both
In simple words

To go inside somewhere without anyone seeing you, usually because you're not allowed in.

Literal meaning: To sneak (move secretly) while going inward — largely transparent.

Meanings

1 A2 informal

To enter a place secretly and without permission, trying not to be seen.

"They didn't have tickets, so they tried to sneak in through the side door."

Grammar: inseparable
2 A2 informal

To bring something into a place secretly, especially something that is not allowed.

"She managed to sneak her phone in even though electronics were banned in the exam room."

Grammar: separable
3 B1 idiomatic informal

To insert something (a remark, clause, or item) quietly into a conversation, document, or schedule so it goes unnoticed.

"The lawyers sneaked in an extra clause at the bottom of the contract."

Grammar: separable
Usage notes

Used both for people entering secretly and for smuggling items in. Also used figuratively for inserting a comment or item into a conversation or document without drawing attention.

Commonly used with

back door side entrance comment clause without being seen after hours

Forms

Base
sneak in
I/you/we/they
3rd person
sneaks in
he/she/it
Past simple
sneaked in
yesterday
Past participle
sneaked in
have + pp
-ing form
sneaking in
continuous

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Synonyms

slip in creep in smuggle in squeeze in work in

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