When you make something possible, you enable it. Your good grades might enable you to get into your first-choice college. And a great teacher enabled you to get such good grades.
Enable has taken on the meaning of allowing or even helping someone continue to do something they really shouldn't. If your mother writes note after note to get you out of school for no good reason, she is enabling your habit of playing hooky. While you might think she's being cool, a therapist might call her an enabler and give her part of the blame.