impregnable
im|preg|nable /ɪmpr'egnəbəl/
1 [ADJ]
If you describe a building or other place as impregnable, you mean that it cannot be broken into or captured.
The old Dutch fort with its thick high walls looks virtually impregnable...
= impenetrable
2 [ADJ]
If you say that a person or group is impregnable, or their position is impregnable, you think they cannot be defeated by anyone.
The Bundesbank's seemingly impregnable position has begun to weaken.
= unassailable
1 [ADJ]
If you describe a building or other place as impregnable, you mean that it cannot be broken into or captured.
The old Dutch fort with its thick high walls looks virtually impregnable...
= impenetrable
2 [ADJ]
If you say that a person or group is impregnable, or their position is impregnable, you think they cannot be defeated by anyone.
The Bundesbank's seemingly impregnable position has begun to weaken.
= unassailable