UNDERTAKE

[verb] [past simple] undertook, [past participle] undertaken [slightly formal] - to do or begin to do (something), or (formal) to promise that you will do somethingStudents are required to undertake simple experiments. [T]It's the largest survey ever undertaken. [T]A local business undertook the work, but went bankrupt before they finished. [T]The United Nations was supposed to undertake (= take responsibility for) the role of global peace-keeper. [T](formal) She undertook not to publish the names of the people involved. [+ to infinitive](formal) The government undertook that the buildings would not be redeveloped. [+ that clause]