"Under international law, humans possess an inviolable [ɪnˈvaɪələbəl] right to freedom of thought. As part of this, governments have a duty to create an environment where people can think freely." — Simon McCarthy-Jones, The Conversation, 27 Sept. 2023

inviolable [ɪnˈvaɪələbəl]
adj

formal term - describe something too important to be ignored or treated with disrespect.

Inviolable is a venerable word that has been with us since the 15th century. Its opposite, violable ("capable of being or likely to be violated"), appeared in the following century.

Both terms descend from the Latin verb violare, which both shares the meaning with, and is an ancestor of, the English word violate.

English