sacrosanct — ONAD

sacrosanct /ˈsakrōˌsaNG(k)t, ˈsækroʊˌsæŋ(k)t

▸ adjective (especially of a principle, place, or routine) regarded as too important or valuable to be interfered with:

the individual's right to work has been upheld as sacrosanct.

– DERIVATIVES
sacrosanctity /ˌsakrōˈsaNG(k)tədē, ˌsækroʊˈsæŋ(k)tədi

/ noun

– ORIGIN late 15th century : from Latin sacrosanctus, from sacro ‘by a sacred rite’ (ablative of sacrum) + sanctus ‘holy’.