undertaking

American  

[uhn-der-tey-king, uhn-der-tey-, uhn-der-tey-king] / ˌʌn dərˈteɪ kɪŋ, ˈʌn dərˌteɪ-, ˈʌn dərˌteɪ kɪŋ /

noun

1. the act of a person who undertakes any task or responsibility.

2. a task, enterprise, etc., undertaken.

   Synonyms:

   venture, effort, job, endeavor, project

3. a promise; pledge; guarantee.

4. the business of an undertaker or funeral director.

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undertaking British  

/ ˈʌndəˌteɪkɪŋ /

noun

1. something undertaken; task, venture, or enterprise

2. an agreement to do something

3. the business of an undertaker

4. informal the practice of overtaking on an inner lane a vehicle which is travelling in an outer lane

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Etymology

Origin of undertaking

Middle English word dating back to 1325–75; under, taking

Explanation

Painting a house is a serious undertaking––it looks simple but involves a lot of preparation and hard work. An undertaking is a job or a task you commit to. The word also can mean the profession of funeral management. When you take something under consideration, it means you're not necessarily going to do it, you're just going to think about it. When you take something on, you've undertaken to actually do it. The word undertaking suggests something that involves quite a bit of work. Organizing an Oxfam hunger-day at your school is a significant undertaking, but it's worth all the effort.

Example Sentences

Staging a strike is a huge undertaking, as is preparing to cope with a strike.

From Los Angeles Times • Apr. 13, 2026

In undertaking this role, one of the most challenging and revered in 20th-century theater, he willfully—and rewardingly—hides that blazing light under a proverbial bushel.

From The Wall Street Journal • Apr. 10, 2026

“Most investors we speak with are cautious about power companies undertaking large new nuclear risk in general,” he wrote.

From Barron's • Mar. 30, 2026

But the DWP's own advisers say ministers have not done enough to reassure claimants, including those described as having "fluctuating" conditions, that "undertaking work‑related activities might lead to reassessment", and hence lower benefit awards.

From BBC • Mar. 30, 2026

Roughly fifty people contributed in some significant way to this undertaking.

From "Class Matters" by The New York Times

Related Words

• affair
• effort
• enterprise
• experiment
• operation
• project
• proposition
• task
• venture