How do you spell Accelerate

Available Definitions:
1)  v. t. - To cause to move faster; to quicken the motion of; to add to the speed of; -- opposed to retard.
2)  v. t. - To quicken the natural or ordinary progression or process of; as, to accelerate the growth of a plant, the increase of wealth, etc.
3)  v. t. - To hasten, as the occurence of an event; as, to accelerate our departure.