1. (a.) Incapable of being hurt, wounded, or harmed\ (used with respect to either physical or moral damage); not susceptible of being profaned or corrupted; sacred; holy; as, inviolable honor or chastity; an inviolable shrine.

2. (a.) Unviolated; uninjured; undefiled; uncorrupted.

3. (a.) Not capable of being broken or violated; as, an inviolable covenant, agreement, promise, or vow.

awesome awful blessed chaste consecrated dependable divine faithworthy hallowed heavenly holy impenetrable impregnable incontestable incorruptible indomitable ineffable inenarrable inexpressible inexpugnable insuperable invincible inviolate invulnerable irresistible numinous overpowering overwhelming proven pure reliable religious resistless responsible sacred sacrosanct spiritual straight sure tested to be trusted tried tried and true TRUE trustable trustworthy trusty unassailable unbeatable unconquerable unfalse unperfidious unspeakable unsubduable unsurmountable untouchable untreacherous unutterable unyielding venerable