Inviolable

a.
  1. Not violable; not susceptible of hurt, wound, or harm (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. Unviolated; uninjured; undefiled; uncorrupted.
  3. Not capable of being broken or violated; as, an inviolable covenant, agreement, promise, or vow.