(每日一词）stipulate

Stipulate  /ˈstɪp.jə.leɪt/ v. 规定，约定；明确说明

meaning: to say exactly how something must be or must be done 

1）词根: stip- 压 （可以不记）

2）助记：st-站+pull 拉 + ate 动词后缀

e.g. We have signed a contract which stipulates when the project must be completed. 我们已签署合同，规定了项目必须完成的时间。