What's unalienable cannot be taken away or denied. Its most famous use is in the Declaration of Independence, which says people have unalienable rights of life, liberty, and the pursuit of happiness.

To find the origins of the word unalienable, we can look at the root, alien, which comes from the Latin alienus, meaning "of or belonging to another." This provides the basis for our word, with the prefix un- providing the turnaround "not," and the suffix -able providing the idea of capability. Therefore, we get “not able to be denied.” Oh, and if you are wondering about the common argument as to whether it is "unalienable" or "inalienable," either is correct.

Definitions of unalienable

adj incapable of being repudiated or transferred to another

“endowed by their Creator with certain unalienable rights”
absolute, infrangible, inviolable
not capable of being violated or infringed
cannot be bought or sold
nontransferable, unassignable, untransferable
incapable of being transferred
intrinsic, intrinsical
belonging to a thing by its very nature
transferable to another owner
that can be appropriated
assignable, conveyable, negotiable, transferable, transferrable
legally transferable to the ownership of another
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