ETYM Latin inviolabilis: cf. French inviolable. Related to Inviolate.
1. Must be kept sacred; SYN. inviolate, sacrosanct.
2. That cannot be transgressed or dishonored.
ETYM Written also tapu.
Forbidden to profane use especially in South Pacific islands; SYN. tabu.
Beyond doubt or reproach
In a sacred manner, in an inviolable manner
In a manner that is beyond reproach; unquestionably; without blemish