undertake/͵ʌndɚˋtek; ˌʌndəˈteIk/v [T] past tense undertook /-ˋtUk; -ˈtʊk/past participle undertaken /-ˋtekən; -ˈteIkən/formal 【正式】1 to start to do a piece of work, especially one that is long and difficult 着手做〔尤指长时间的艰苦工作〕: Baker undertook the task of writing the report. 贝克着手写报告。2 undertake to do sth to promise or agree to do something 答应做某事﹔同意做某事: He undertook to pay the money back in six months. 他答应六个月后还钱。