adj.（要塞）坚固的，无法攻取的；不受影响的，难以改变的；可受孕的，可生育的
impregnably───不可动摇地
impregnatable───可浸渍的
impregnate───vt.使怀孕；灌输；浸透；adj.充满的；怀孕的
impugnable───adj.可责难的；易遭怀疑的
pregnable───adj.可受孕的；易受攻击的；弱的；可攻克的
imprisonable───adj.应判徒刑的；可判徒刑的
impregnableness───坚不可摧
impeccable───adj.无瑕疵的，没有缺点的，完美的；不会犯罪过的
impleadable───adj.控诉的；控告的
The old Dutch fort with its thick high walls looks virtually impregnable.───该座荷兰老城堡城墙又高又厚，看上去固若金汤。
The team built up an impregnable 5-1 lead.───这个队以5:1的绝对优势领先。
The lawyer won his case with an impregnable argument.───律师以无可辩驳的论据打赢了那场官司。
"Ashamed of drinking! " The tippler brought his speech to an end, and shut himself up in an impregnable silence.───“惭愧自己喝酒！”酒鬼不再说话，陷入了深深的沉默。
Not a lot was made of it at the time, but the once impregnable Iron Curtain had been breached.───口子开得并不大，但曾几何时固若金汤的铁幕被撕裂了。
Jack: With me killed, you'd arrive at the cove, find it a stronghold, nigh impregnable. . . able to withstand blockade for years.───我要是死了，你进到那个海湾，却发觉那是个无坚不摧的军事要塞，够你轰个十年八年的。
Nothing but an impregnable simplicity of nature, strengthened by Christian faith, could have kept him from it.───只是由于她坚贞不移的纯朴本性，加上宗教信仰的力量，才使他抵住了这种诱惑。
You think your friendship as impregnable as the Great Wall of steel, you have to do a red and friends secretly glad.───你曾认为你们的友谊如钢铁长城般坚不可摧，你也为有这样一位红粉知己而暗自庆幸。
the enterprise in the business management application to be in an impregnable position in the intense market competition?───如何才能使企业在激烈的市场竞争中立于不败之地？