Here's a re-framing of "free will" that I find very useful - it's more like "free won't." The technical term is Inhibition. Our physical and mental processes may make us
inclined to act in a certain way, but we have a limited ability to inhibit that initial response long enough to do something different by using willpower.
Think of a lion in the brush, ready to pounce on an unsuspecting antelope. The lion wants to pounce, but inhibits the response for a little while, waiting for the antelope to come a little closer.
Since willpower is depleted with use (a process called Ego Depletion), inhibition is a very limited power - it's difficult, requires a lot of energy, and can't be maintained indefinitely. Our natural inclinations and environment are extremely powerful forces, and we can't hold out for long.
That's why, if you're experiencing some form of temptation (wanting to do what you know you shouldn't), it's better to inhibit and remove yourself from the situation as quickly as possible vs. rely on your "free will" to save you. Otherwise, you'll progressively find it more and more difficult to resist until you act.
I find this definition very useful because it maintains human agency (the ability to choose your behavior), while respecting the undeniable power that environment and circumstances have on our behavior.