incapable of being transgressed or dishonored; the person of the king is inviolable; an inviolable oath'

immune to attack; incapable of being tampered with; an impregnable fortress; fortifications that made the frontier inviolable; a secure telephone connection

[ Syn: impregnable , secure , strong , unassailable , unattackable ]

must be kept sacred

[ Syn: inviolate , sacrosanct ]

not capable of being violated or infringed; infrangible human rights

[ Syn: absolute , infrangible ]