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。