immutable right, inalienable right, inherent right, irrevocable right, unconditional right
diritto imprescindibile, diritto inalienabile, diritto naturale
inalienable (inherent) right
droit naturel, pouvoir inaliénable
derecho irrevocablemente adquirido
diritto inalienabile
unabdingbares Recht
unabdingbares Recht
indefeasible right