Free \free\ , adjective;
1. Enjoying person rights or liberty, as a person who is not in slavery
2. Provided without, or not subject to, a charge or payment
3. Not held fast; loose; unattached
This word derives from Old English freo ("free, exempt from, not in bondage" and "noble, joyful") from Proto-Germanic *frijaz, which comes from Proto-Indo-European *prijos ("dear, beloved") based on the root *pri- ("to love"). The connection between "free" and "love" is pretty common in Indo-European languages. The theory is that the free members of your clan, as opposed to the slaves, were your family and friends so you loved them. This is echoed in the verb free from Old English freogan which meant "to free, liberate" and "to love, think lovingly of, honor."
Gives you a whole new perspective on the old adage: If you love something, let it go. If it returns it's yours forever, if not it never was.