undertake
/ˌʌndəˈteɪk/verb
(past -took;past participle -taken /-kən/)with obj.
1- commit oneself to and begin (an enterprise or responsibility); take on着手做; 开创（企业）; 承担（责任）; 接受：
a firm of builders undertook the construction work.
一家建筑商承建这项工程。
1.1
- usu. with infinitive promise to do a particular thing承诺; 答应：
the firm undertook to keep price increases to a minimum.
公司承诺价格涨幅保持最低水准。
1.2
- with clause guarantee or affirm something; give as a formal pledge保证; 同意：
a lorry driver implicitly undertakes that he is reasonably skilled as a driver.
当一名卡车司机就不言自明地保证他的驾驶技术相当纯熟。