Common Mistakes : Ensure

verb

.BAD: We ensure you that we will do our best
.GOOD: We assure you that we will do our best

: (ensure = to make certain (that something will happen or exist
.We need to ensure that our prices remain competitive
.Measures are being taken to ensure public safety

assure = tell someone that something will definitely happen or is definitely true, especially to make them feel less worried
.I assure you that the report will be on your desk by tomorrow lunchtime at the latest
.The doctor assured me that there was no need for alarm