Invulnerable
Pronunciation : In*vul"ner*a*ble
Part of Speech : a.
Etymology : [L. invulnerabilis: cf. F. invuln?rable. See In- not, and Vulnerable.]
Definition : 1. Incapable of being wounded, or of receiving injury. Neither vainly hope To be invulnerable in those bright arms. Milton.
2. Unanswerable; irrefutable; that can not be refuted or convinced; as, an invulnerable argument.
Source : Webster's Unabridged Dictionary, 1913