1. tells someone confidently that something is true or will happen in order to remove doubt or worry
Usage: third person singular present tense of ‘assure’
2. makes something certain to happen or be achieved
Usage: third person singular present tense of ‘assure’

Examples

• She assures me that the project will be finished on time.
• The doctor assures his patients that the procedure is safe.
• Regular practice assures improvement in your skills.
• The company assures quality by testing every product.
• He assures everyone that he will attend the meeting.
• Good preparation assures success on the exam.
• The manager assures customers of excellent service.