one thing is (for) sure

phrase

: it is certain : certainly
One thing is (for) sure, we'll never eat there again.

Examples of one thing is (for) sure in a Sentence

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People online can call you an old hag or too young, but one thing is for sure. Lea Veloso, StyleCaster, 3 Dec. 2025 But one thing is for sure, the message that Haslem, Spoelstra and others are trying to send Ware through their public challenges is being delivered. Anthony Chiang, Miami Herald, 18 Nov. 2025 See All Example Sentences for one thing is (for) sure

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“One thing is (for) sure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one%20thing%20is%20%28for%29%20sure. Accessed 22 Jul. 2026.

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