Impregnable rocks Synonyms

Impregnable replaced

invincible rocks

indestructible rocks

insurmountable rocks

impassable rocks

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

IR abbreviation

IR is an abbreviation for Impregnable Rocks

What does IR stand for?

IR stands for "Impregnable Rocks"