- inalienable, unalienable - incapable of being repudiated or transferred to another; "endowed by their Creator with certain unalienable rights"
Antonyms: alienable, appropriable, assignable, conveyable, negotiable, transferable, transferrable
- unforfeitable, inalienable - not subject to forfeiture; "an unforfeitable right"
Antonym: defeasible (indirect, via indefeasible)