impregnable [adjective]

Definition of impregnable:

immune to attack; incapable of being tampered with

Synonyms of impregnable:

● Inviolable

● Secure

● Strong

● Unassailable

● Unattackable

● Firm

● Hard

● Sound

● Stable

● Stiff

● Fast

● Unyielding


Opposite/Antonyms of impregnable:

● Vulnerable

● Helpless

● Vacillant

● Unsustainable

● Absorbent

● Bendable

● Conquerable

● Fragile

● Powerless

● Weak


Sentence/Example of impregnable:

The castles were all but impregnable and served as Norman anchors in a Saxon sea.