un·der·tak·ing 
/ˈʌndɚˌteɪkɪŋ/ noun
plural un·der·tak·ings /ˈʌndɚˌteɪkɪŋ/ noun 1 [count] : an important or difficult task or project
▪ The restoration of the old theater is a huge/major/massive undertaking. ▪ He advised us against such a risky/dangerous undertaking. ▪ a new creative undertaking 2 [noncount] : the business of an undertaker
▪ a career in undertaking 3 [count] Brit, formal : a promise or agreement to do or not do something
▪ The newspaper gave an undertaking [=promised] not to disclose his identity.
▪ The restoration of the old theater is a huge/major/massive undertaking. ▪ He advised us against such a risky/dangerous undertaking. ▪ a new creative undertaking
▪ a career in undertaking
▪ The newspaper gave an undertaking [=promised] not to disclose his identity.
