To assure anew; to restore confidence to; to free from fear or terror.

cause to feel sure; give reassurance to; "The airline tried to reassure the customers that the planes were safe"

give or restore confidence in; cause to feel sure or certain; "I reassured him that we were safe"

7ri:[5Fu[ / v. make someone feel calmer and less worried or frightened about a problem or situation

To reinsure.