Synonyms of 'inviolable'
sacrosanctDictionary, sacred, hallowedThe game had a single inviolable rule
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Hallowed is used to describe something that is respected and admired, usually because it is old, important, or has a good reputation.
Their resting place is in hallowed ground.
If you describe something as holy, you mean that it is considered to be special because it is connected with God or a particular religion.
To them, as to all Tibetans, this is a holy place.
If you say that someone has an inalienable right to something, you are emphasizing that they have a right to it which cannot be changed or taken away.
respect for the inalienable rights of people and nations
Thesaurus for inviolable from the Collins English Thesaurus
If a law or principle is inviolable , you must not break it.