adjective
sacrosanct
SAK-roh-sankt/ˈsækrəʊsæŋkt/
Regarded as too sacred or important to be changed or criticized.
The protected document is treated as sacrosanct, with visitors prevented from touching it.

Etymology
The pieces describe something made sacred and protected by religious sanction. That protection extends figuratively to anything treated as beyond violation or criticism, even outside religion.
In context
evidence is sacrosanct in any investigation that's how you find out the truth
More examples
- The committee treats the founder's original plan as sacrosanct.
- No scientific theory is sacrosanct; new evidence can challenge it.
- She considers her lunch break sacrosanct and refuses to schedule meetings.
Forms
sacrosanct
Similar words
- inviolable
- Emphasizes protection from violation rather than criticism or change.
- sacred
- Emphasizes religious holiness or deep reverence, not necessarily immunity from criticism.
- untouchable
- Can suggest practical protection through power rather than reverence.