un·der·take 
/ˌʌndɚˈteɪk/ verb
un·der·takes; un·der·took /ˌʌndɚˈteɪk/ verb /-ˈtʊk/ un·der·tak·en /-ˈteɪkən/ un·der·tak·ing [+ obj] formal 1 : to begin or attempt (something)
▪ undertake a task/journey ▪ He's undertaking a thorough search. ▪ The researchers undertook a series of studies. 2 : to agree or promise to do (something) — usually followed by to + verb ▪ He undertook to raise his sister's child. ▪ The company undertook to end the strike.
▪ undertake a task/journey ▪ He's undertaking a thorough search. ▪ The researchers undertook a series of studies.
