impregnability

1. The need to be seen protecting the home front has apparently extended political impregnability over another big chunk of the federal budget.
   让民众看到保护家园的需要，显然使政治坚盾延伸到了联邦预算的另一大项上。
2. It was the enemy's boast of impregnability that caused their own defeat.
   敌人自我吹嘘战无不胜，这最终导致了他们自己的失败。

noun

1. having the strength to withstand attack

   Synonym:    invulnerability