assure
/əˈʃɔːr/
to tell someone confidently that something is true, especially so that they do not worry
(尤指为消除其忧虑而)确定地对…说，向…保证，使确信;让…放心
She assured him (that) the car would be ready the next day.
她向他保证说他得车第二天就能修好。
You can rest assured that I shall be there as promised.
你放心，我答应了就一定会到得。
