Source : Webster's Revised Unabridged Dictionary (1913)

Unalienable \Un*al"ien*a*ble\, a.
   Inalienable; as, unalienable rights. --Swift. --
   {Un*al"ien*a*bly}, adv.

Source : WordNet®

unalienable
     adj : incapable of being repudiated or transferred to another;
           "endowed by their Creator with certain unalienable
           rights" [syn: {inalienable}] [ant: {alienable}]