Must be kept sacred
English: inviolable, inviolate, sacrosanct
inviolableEnglish
inviolable, absolute, impregnable, infrangible, inviolate
Adjective
Incapable of being transgressed or dishonored
English: inviolable
Immune to attack, incapable of being tampered with
English: impregnable, inviolable, secure, strong, unassailable, unattackable
1 more adjective senses
Not capable of being violated or infringed
English: absolute, infrangible, inviolable