make certain

idiom

: to do something or find out something so that one has no doubt about whether something is true, correct, will happen, etc.

Make certain (that) you lock the door when you leave.

We must make certain this doesn't happen again.

She made certain she thanked each of them for coming.

Examples of make certain in a Sentence

Recent Examples on the Web

By removing maintenance-heavy internal combustion systems and replacing them with electric drivetrains, Everrati aims to make certain classics viable daily drivers again, particularly in regions where clean-air zones and emissions restrictions increasingly limit access. —Paul Ratner, Interesting Engineering, 17 Dec. 2025

Improved depression symptoms could also help a person make certain lifestyle changes that boost brain health. —Emily Kay Votruba, EverydayHealth.com, 16 Dec. 2025

For one, they're loaded with vitamin C, which helps your body make certain white blood cells. —Lindsay Curtis, Health, 8 Dec. 2025

Neuroscience also offers tried and tested techniques to help understand the reasons models make certain decisions — a research field AI companies are increasingly investing in to make systems more transparent and predictable. —Rachyl Jones, semafor.com, 26 Nov. 2025

Rhymes for make certain

• bertin
• curtain
• uncertain