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.
1530, from L. inviolabilis "invulnerable," from in- "not" + violabilis, from violare "to do violence to" (see violation). The adj. inviolate "unbroken, intact" is attested from 1412.