assure · verb T /əˈʃʊr/Full view
B2 to tell someone confidently that something is true, especially so that they do not worry
Dictionary example:

She assured him (that) the car would be ready the next day.

Learner example:

I can assure you that the food will be delicious. (First Certificate in English; B2; Greek)

C1 to make something certain to happen
Dictionary example:

This loan should assure the company's future.

Learner example:

The PT is guaranteed to assure higher test results or your money back! (Certificate in Advanced English; C1; Russian)

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