Invulnerable
Invulnerable , adjective
[Latin invulnerabilis: compare French invulnérable. See In- not, and Vulnerable.]
1.
Incapable of being wounded, or of receiving injury.
Neither vainly hope
To be invulnerable in those bright arms.
2.
Unanswerable; irrefutable; that can not be refuted or convinced; as, an invulnerable argument.