invulnerable

adj

Etymology: From Middle French invulnérable, from Latin invulnerābilis, from vulnerābilis, from vulnerō (“to wound”), from vulnus (“wound”), equivalent to in- + vulnerable.

1. Incapable of being injured; not vulnerable.

   “His gaze went to Hirken, who stood gloating behind invulnerable transparisteel.”

2. Unanswerable; irrefutable.

   “an invulnerable argument”