Third-person singular simple present indicative form of assure.(verb)
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Use "assures" in a sentence
"Roslin assures Lee that document would have gone through the proper legal channels."
"The win assures Pitt (9-3, 5-2) of a share of second place in the Big East."
"Harvey Weinstein assures the LA Times that the date changes has nothing to do with the speculated poor financial health of the company, but instead the changes were made because early 2009 offers a better opportunity to be seen."