/,ʌndə'teɪkɪŋ; ,ʌndɚ`tekɪŋ/
n
1 [sing] work, etc that one has undertaken; task or enterprise 任务; 事业; 企业
*a commercial, financial, etc undertaking商业、金融等企业
* Small businesses are a risky undertaking.小型企业要担很大的风险.
* Getting married is a serious undertaking. 结婚是件大事.
2 ~ (that.../to do sth) (fml 文) promise or guarantee 答应; 许诺; 保证; 担保
*an undertaking that the loan would be repaid 一项偿还贷款的担保
* She gave a solemn undertaking to respect their decision. 她郑重地保证尊重他们的决定.

/'ʌndəteɪkɪŋ; `ʌndɚ,tekɪŋ/
n [U] business of an undertaker 殡仪业.

n
[C usually singular]
an important job, piece of work, or activity that you are responsible for
　Starting a new business can be a risky undertaking.
[C]formal
a promise to do something
　Both organizations gave an undertaking to curb violence among their members.
[U]
the business of an undertaker