Enter a clue or pattern or both:
The Clue
Impervious to attack (10 letter answer)
The Answer
INVINCIBLE
Tags
Notes
The answer INVINCIBLE is so rare that it appears less than once every 2500 puzzles.
Definition
INVINCIBLE as an adjective:
1. (invincible, unbeatable, unvanquishable) = incapable of being overcome or subdued; "an invincible army"; "her invincible spirit"