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impregnable

adjective

/ɪmˈprɛɡnəbl̩/

Meaning

Unable to be captured, broken into, or defeated.

The fortress was considered impregnable by the enemy.

invincible, unassailable, indestructible, secure, invulnerable

vulnerable, weak, defenseless

impregnable fortress, impregnable defense, impregnable position, impregnable wall

Extremely good or wonderful; almost unbelievable

dressed or covered in a particular way

full of woe; very sad or miserable; also used to mean very bad or deplorable

dealing with things sensibly and realistically in a way that is based on practical rather than ideal...

annoyingly insensitive or slow to understand; lacking in intelligence or perception

actually existing or happening; true and not imagined