undertake

verb

un·​der·​take ˌən-dər-ˈtāk 

undertook ˌən-dər-ˈtu̇k  ; undertaken ˌən-dər-ˈtā-kən  ; undertaking

transitive verb

1

: to take upon oneself : set about : attempt

undertake a task

undertake to learn to swim

2

: to put oneself under obligation to perform

also : to accept as a charge or responsibility

the lawyer who undertook the case

3

: guarantee, promise

readily undertook that the letter should be securely conveyed

—Sir Walter Scott

intransitive verb

archaic : to give surety or assume responsibility

Synonyms

• accept
• assume
• shoulder

Examples of undertake in a Sentence

He's undertaking a thorough search.

The researchers undertook a series of studies.

Recent Examples on the Web

The statute says when jurors can’t agree, a judge undertakes the three-step procedure. —Katie Moore, Kansas City Star, 26 June 2025

Under the command of former NASA astronaut Peggy Whitson, the crew members are due to undertake about 60 scientific experiments during their time aboard the orbital laboratory. —Eric Lagatta, USA Today, 26 June 2025

Final Thought Hiring is among the most consequential activities any company undertakes. —Kehinde Fawumi, Forbes.com, 23 June 2025

Fieldwork was undertaken between 29th April – 1st May 2024. —Katie Kelton, Boston Herald, 22 June 2025

Word History

First Known Use

14th century, in the meaning defined at transitive sense 1

Rhymes for undertake

• overtake
• rattlesnake
• shiitake
• wapentake
• ache
• ake
• bake
• brake
• break
• cake
• craik
• crake

Kids Definition

undertake

verb

un·​der·​take ˌən-dər-ˈtāk 

undertook -ˈtu̇k  ; undertaken -ˈtā-kən  ; undertaking

1

: to take upon oneself as a task : enter upon

undertake a journey

2

: to take on as a duty : agree, contract

undertake to deliver a package