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

However, pregnancy can make certain symptoms like fatigue and bladder issues worse. —Brandi Jones, Msn-Ed, Rn-Bc, Health, 24 Sep. 2024

These rules make certain that only individuals with the necessary clearance can reach sensitive data, consequently decreasing the likelihood of data violations and cultivating a protective setting for strategic planning. —Damodar Selvam, Forbes, 17 Sep. 2024

This is also going to cause the Secret Service to make certain choices about resources because their capabilities are not infinite. —Javed Ali, The Conversation, 15 July 2024

Both Trump and Harris would make certain income entirely tax-free for some workers but not others. —Howard Gleckman, Forbes, 9 Sep. 2024