Inviolable (adjective)

1. Incapable of being violated or infringed.
2. Respected and regarded as sacred or holy.

Origin:

Late 16th century: from french, or from latin inviolabilis, from in- 'not' + violare 'violate'.

Examples:

1. The Constitution guarantees certain inviolable rights.
2. The Church holds the Pope's person to be inviolable.
3. The temple is considered an inviolable sanctuary.
4. The treaty was considered inviolable until one of the signatories broke it.
5. His privacy was considered inviolable and was never intruded upon.