sacrosanct

1. (figurative) Beyond alteration, criticism, or interference, especially due to religious sanction; inviolable.Examples: "It will be noted that pre-grouping routes between London and Scotland are no longer sacrosanct—for example, Glasgow St. Enoch trains no longer run necessarily to St. Pancras."; "Closer investigation revealed these as millions of elaborate crypts a few meters below the surface, left by a long-extinct spacefaring species called the zeioph. Many human universities wish to perform archeological excavations. Council law holds grave sites as sacrosanct, however, and the matter has been tied up in court for a decade."; "After decades of being considered politically sacrosanct, why are homeowner mortgage write-offs suddenly on the chopping block?"figuratively