assure

这笔贷款应能确保公司的未来。

This loan should ___assure the company's future.

我可以向您保证，付款将在今天处理。

I can ___assure you that the payment will be processed today.

有效的规划将确保项目及时完成。

Effective planning will ___assure the timely completion of the project.