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.

Dictionary Entries Near make certain

make capital out of

make certain

make certain of

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“Make certain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/make%20certain. Accessed 5 Dec. 2022.

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