1. immune to attack; incapable of being tampered with;

   "an impregnable fortress"
   "fortifications that made the frontier inviolable"
   "a secure telephone connection"
   

2. capable of conceiving

3. incapable of being overcome, challenged or refuted;

   "an impregnable argument"
   "impregnable self-confidence"
   

1.牢不可破的;固若金汤的;无法攻取的
If you describe a building or other place asimpregnable, you mean that it cannot be broken into or captured.

e.g. The old Dutch fort with its thick high walls looks virtuallyimpregnable...
古老的荷兰城堡城墙又厚又高,看起来几乎固若金汤。
e.g. In thoseimpregnable mountains, the guerrillas could hold out for years.
在那些易守难攻的大山里，游击队可以坚持很多年。

2.不可战胜的;不可撼动的
If you say that a person or group isimpregnable, or their position isimpregnable, you think they cannot be defeated by anyone.

impregnable的解释

e.g. The Bundesbank's seeminglyimpregnable position has begun to weaken.
德意志联邦银行看似不可撼动的地位开始削弱了。

1. 对手不会倒地和拥有QUAKE效果：RESERVE OFFENSE UP 攻击力上升(双方) |impregnable 对手不会倒地和拥有QUAKE效果 | HOLY WINGS 各能力提升

2.

2. 可浸透的：impregnability 坚固性 |impregnable 可浸透的 | impregnant 浸渍剂

3. 无法攻取的：impregnability 攻不破 |impregnable 无法攻取的 | impregnant 溶剂

4. 能浸透的：impounding滤网 | impregnability浸渗能力 |impregnable能浸透的