inviolable
adjective
[ ɪnˈvʌɪələb(ə)l ]
• never to be broken, infringed, or dishonoured.
• "an inviolable rule of chastity"
Similar:
inalienable,
absolute,
untouchable,
unalterable,
unchallengeable,
unbreakable,
impregnable,
sacrosanct,
sacred,
holy,
hallowed,
intemerate,
Origin:
late Middle English: from French, or from Latin inviolabilis, from in- ‘not’ + violabilis ‘able to be violated’ (from the verb violare ).