- Insusceptible - Sadly unlivable around points at river opening, but protected from attack - Unassailable - Incapable of being wounded, or of receiving injury. - Unanswerable; irrefutable; that can not be refuted or
convinced; as, an invulnerable argument.
- Exempt from obligation - Exempt from, ... to - In reverse, duodenum might internally be protected from disease - Insusceptible - Invulnerable - Protected against a disease - Resistant