Answer: Unalienable rights
An added note of explanation:
You'll see both "unalienable" and "inalienable" used in description of these sorts of rights that cannot be taken away because they are not granted by man but are ever human being's natural possession. In the final version of the Declaration of Independence, the spelling unalienable was used. That was the copy of the document as transcribed by John Adams, which was used for printed copies to be made. Thomas Jefferson's original draft used the spelling inalienable. The two variations of the word were both in use at the time in the 18th century. Either way, the word means something that cannot be made alien to you -- in other words, something that is naturally your possession and cannot be taken away from you.