Invulnerable
THE INABILITY OF AN ENTITY TO WITHSTAND THE ADVERSE EFFECTS OF A HOSTILE OR UNCERTAIN ENVIRONMENT
Window of vulnerability; Vulnerabilities; Invulnerable; Invulnerability
·adj Incapable of being wounded, or of receiving injury.
II. Invulnerable ·adj Unanswerable; irrefutable; that can not be refuted or convinced; as, an invulnerable argument.