Impregnable isn't Synonyms

Impregnable replaced

invincible isn't

Definitions for Impregnable

(adjective) incapable of being defeated, overcome , or subdued
(adjective) impossible to get through or into
(adjective) immune to attack; incapable of being tampered with

II abbreviation

II is an abbreviation for Impregnable Isn't

What does II stand for?

II stands for "Impregnable Isn't"