Source : Webster's Revised Unabridged Dictionary (1913)

Inalienable \In*al"ien*a*ble\, a. [Pref. in- not + alienable:
   cf. F. inali['e]nable.]
   Incapable of being alienated, surrendered, or transferred to
   another; not alienable; as, in inalienable birthright.

Source : WordNet®

inalienable
     adj 1: incapable of being repudiated or transferred to another;
            "endowed by their Creator with certain unalienable
            rights" [syn: {unalienable}] [ant: {alienable}]
     2: not subject to forfeiture; "an unforfeitable right" [syn: {unforfeitable}]