English Reference
verb · noun · adjective

sneak

v. · n. · adj.
US /ˈsnik/ UK /snˈiːk/ sneak UK spelling sneaked, sneaks

infinitive sneak past sneaked / snuck (US) past participle sneaked / snuck (US)

  1. 01 B1 Intermediate

    v.to move quietly and secretly so that people do not see or hear you.

    v.to move in a stealthy or surreptitious manner to avoid detection.

    Simple

    I tried to sneak into the house without waking my parents.

    In context

    The teenagers attempted to sneak past the security guard, but the gravel crunching under their boots gave them away immediately.

    creepsliptiptoe
  2. 02 B2 Upper Intermediate

    v.to take, give, or bring something secretly.

    v.to convey or obtain something surreptitiously, often bypassing rules or observation.

    Simple

    She managed to sneak some snacks into the cinema in her large bag.

    In context

    He tried to sneak a glance at his colleague's notes during the meeting to see if his own proposal was mentioned.

  3. 03 B2 Upper Intermediate InformalBritish English

    v.to tell a person in authority about something bad that someone else has done.

    v.to inform an authority figure of another person's misconduct or secrets.

    Simple

    Don't sneak on your brother just because he stayed up late.

    In context

    The younger students were warned not to sneak on their peers, as the school culture valued loyalty over strict rule enforcement.

    Usage

    usually takes the preposition 'on'

    snitchtattleinform
  4. 04 B2 Upper Intermediate Informal

    n.a person who secretly tells an authority about someone else's mistakes.

    n.a person who acts in a stealthy or underhanded way, particularly an informer or tell-tale.

    Simple

    Nobody liked him because he was a sneak who told the teacher everything.

    In context

    The office environment became toxic when it was discovered that a sneak was reporting private conversations to the department head.

  5. 05 C1 Advanced American EnglishTechnical Sport

    n.a play where the quarterback dives forward with the ball to gain a short distance.

    n.an offensive play in which the quarterback takes the snap and immediately lunges forward.

    Simple

    The team won the game with a clever sneak on the final play.

    In context

    With only inches to go for a first down, the coach called for a quarterback sneak to secure the position.

    quarterback sneak
  6. 06 B2 Upper Intermediate

    adj.done or happening in a secret or surprise way.

    adj.acting or occurring in a stealthy, unannounced, or surreptitious manner.

    Simple

    The army launched a sneak attack in the middle of the night.

    In context

    The studio arranged a sneak preview of the film to gauge audience reactions before the global marketing campaign began.

He kept her there for four days before a couple of US aid workers sneaked her away on a private plane.

The Guardian· 27 Aug 2026

Possibly from Middle English sniken (“to creep, crawl”), from Old English snīcan (“to creep, crawl”), from Proto-West Germanic snīkan, from Proto-Germanic snīkaną (“to creep, crawl”), which is related to the root of snake. Compare Danish snige (“to sneak”), Swedish snika (“to sneak, hanker after”), Icelandic sníkja (“to sneak, hanker after”). Possibly related to snitch.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin gem-pro *snīkaną
Level B2 · Upper Intermediate
Frequency Frequent
Updated