commencement

commencement
noun

[usu. in sing.]the time, action, or process of beginning
开始时间；开始
at the commencement of training.
训练开始时。
[mass noun]the date of commencement.
开始日期。
■the first part or earliest stage
开始部分；初期
the commencement of this chapter.
这一章的开头。
(N. Amer.)a ceremony in which degrees or diplomas are conferred on university or high-school students
(北美)（大学或高中的）毕业典礼；学位授予典礼
[as modifier]a commencement address.
毕业典礼上的致辞。

语源