undertaking

Pronunciation: /ˈʌndə(ɹ)ˌteɪkɪŋ/

The English word “undertaking” has 4 meanings listed here.

noun

The business of an undertaker, or the management of funerals.
A promise or pledge; a guarantee.
That which is undertaken; any business, work, or project which a person engages in, or attempts to perform; an enterprise.
The act of one who undertakes (in either sense).

By surface analysis, undertake + -ing.

Keep exploring: in the interactive dictionary every word of a definition is a link. Open “undertaking” there

The English dictionary on Glottosphere has 650,529 entries with a page. Browse the English dictionary.

Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.