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Definition
assure PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic Hide phonetics
verb [T]
1 PROMISE to tell someone that something is certainly true, especially so that they do not worry
[+ (that)] She assured them that she would be all right.

2 MAKE CERTAIN to make something certain to happen
This loan should assure the company's future.

The first and last word in dictionaries