Secure from violation or profanation: an inviolable reliquary deep beneath the altar.
Impregnable to assault or trespass; invincible: fortifications that made the frontier inviolable.
[Middle English, from Old French, from Latin inviolābilis : in-, not; see in-1 + violāre, to violate; see violate.] in·vi'o·la·bil'i·ty, in·vi'o·la·ble·ness n., in·vi'o·la·bly adv.