undertaking

US /ˈʌn.dɚˌteɪ.kɪŋ/
UK /ˈʌn.dɚˌteɪ.kɪŋ/
"undertaking" picture
1.

a formal pledge or promise to do something

:
He gave a solemn undertaking to complete the project on time.
The company gave an undertaking not to disclose confidential information.
2.

a task or enterprise, especially a large or difficult one

:
Building the bridge was a massive undertaking.
Starting a new business is a challenging undertaking.