English Reference
verb · noun

undertake

v. · n.
US /ˈəndɝˌteɪk/ UK /ˌʌndətˈeɪk/ un·der·take UK spelling undertakes

infinitive undertake past undertook past participle undertaken

  1. 01 B2 Upper Intermediate Academic

    v.to start a piece of work, a project, or a responsibility.

    v.to commit to and begin a specific task, project, or responsibility. Transitive — requires a direct object representing the activity.

    Simple

    The university decided to undertake a major study on climate change.

    In context

    The engineering firm agreed to undertake the bridge restoration project, despite the significant logistical challenges posed by the winter weather.

    Usage

    Often used with nouns like 'task', 'study', 'project', or 'journey'.

  2. 02 C1 Advanced Formal

    v.to promise or agree that you will do something.

    v.to pledge or formally commit oneself to an obligation or course of action. Often followed by a 'to' infinitive.

    Simple

    The company will undertake to finish the repairs by the end of the week.

    In context

    The defendant must undertake to remain within the jurisdiction of the court until the trial has concluded.

    Usage

    Commonly followed by a 'to' infinitive clause.

  3. 03 C1 Advanced British EnglishInformal

    v.to drive past a slower car using the lane on the left (in countries where people drive on the left).

    v.to overtake a slower vehicle on the nearside (the side closest to the verge or kerb).

    Simple

    It is dangerous to undertake other cars on the motorway.

    In context

    The driver was pulled over by the police after he tried to undertake a lorry on a busy stretch of the M25.

    Teacher's tip

    This is specifically British usage; in American English, this is simply called 'passing on the right'.

  4. 04 C2 Proficiency British EnglishInformal

    n.the act of driving past a slower car on the left side.

    n.the act of passing a slower-moving vehicle on the nearside.

    Simple

    The police officer gave him a ticket for a dangerous undertake.

    In context

    Aggressive undertakes are a common cause of accidents on multi-lane highways where lane discipline is poor.

Usage currently undertake · undertake activity · undertake analysis

Top tip: No matter what project you undertake, stay open-minded.

The Guardian· 26 Aug 2026

The King and Queen will undertake a royal visit to Antigua and Barbuda during an autumn tour, Buckingham Palace has announced.

Sky News· 26 Aug 2026

From Middle English undertaken; equivalent to under- + take (after undernim).

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

This entry
Origin Middle English undertaken
Level B2 · Upper Intermediate
Frequency Frequent
Updated