inviolable

adjective3

1. •
   Not violable; not to be infringed.

   • But come, for thou, be sure, shalt give account / To him who sent us, whose charge is to keep / This place inviolable, and therefore these from harm. — 1667
2. •
   Not susceptible to violence, or of being profaned, corrupted, or dishonoured.
3. •
   Incapable of being injured or invaded; indestructible.