ensure

en-SHOOR

meaning in plain English

To do something so a good result is certain to happen.

Picture yourself double‑checking a lock to ensure the door stays shut.

for example

I’ll double-check the locks to ensure no one can break in while we’re away.

When you ensure something, you take steps so you can say, "I’ve done all I can to make sure this turns out right." Imagine you’re baking a cake and you set a timer—you’re not just hoping it’s done on time, you’re making sure it is.