Definition of assure oneself
: to make oneself sure or certain about something
He tried opening the door to assure himself that it was locked. They managed to be third in line, assuring themselves of good seats for the concert.
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“Assure oneself.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/assure%20oneself. Accessed 24 Jun. 2022.
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