if your talking about the forward assist it is to ensure the round is locked into the barrel

Ensure that he/she eats a meal and drinks a one quart canteen of water.

The heart and veins are the parts of the circulatory system that have valves to assist with blood flow.

The solicitor will ensure that everything is done correctly. They can assist in taking advantage of the tax and gift laws.

They can use one on one teaching to assist the student. They can also give out special assignments to each student to help assist with their learning styles.