inviolable
adjectiveUK /ɪnˈvaɪələbl/
US /ɪnˈvaɪələbl/
Something inviolable is so special that no one is allowed to break it or hurt it.
The rules of the game are inviolable, so nobody can change them.
RELATED WORDS
OTHER MEANINGS
2. Too important to be broken or ignored, like a promise or a law.
The treaty was considered inviolable by both countries.
3. Safe from being harmed or attacked.
The old temple was inviolable, guarded by soldiers day and night.
4. Something that must always be respected and never changed.
For her, honesty was an inviolable rule.