1. (

• inviolable

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

2. (

• impregnable ,
• inviolable ,
• secure ,
• strong ,
• unassailable ,
• unattackable

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

3. (

• inviolable ,
• inviolate ,
• sacrosanct

) must be kept sacred ;

4. (

• absolute ,
• infrangible ,
• inviolable

) not capable of being violated or infringed; "infrangible human rights" ;