The question now is whether AIG is finally losing its aura of impregnability.
From the economist.com
However, by early 1916, its much-vaunted impregnability had been seriously weakened.
From the en.wikipedia.org
But to the South Africans, he no longer projects impregnability.
From the smh.com.au
It is a measure of his mental impregnability.
From the telegraph.co.uk
Given the impregnability of brand SBW to date, it's highly unlikely this latest fiasco will leave much of a dent.
From the nzherald.co.nz
Tech's impregnability is a fading memory.
From the time.com
Even at the height of his powers, I would argue that Federer was known more for his physical gifts than for mental impregnability.
From the sportsillustrated.cnn.com
Such is the impregnability of this new comfort zone that Hamilton is able to wait patiently for things to come his way in 2012.
From the independent.co.uk
Only his successor, Tony Blair, arguably the most un-Labour leader of all, enjoyed years of respect and seeming impregnability.
From the guardian.co.uk
More examples
Invulnerability: having the strength to withstand attack
(impregnable) immune to attack; incapable of being tampered with; "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
(Impregnable) Two ships and two establishments of the Royal Navy have been named HMS Impregnable: * was a 98-gun second rate. This ship of the line was launched in 1786 and wrecked in 1799. * was a 98-gun second-rate launched in 1810. ...
The quality or state of being impregnable; invincibility
(impregnable) Too strong to be penetrated
(Impregnable) A woman whose memory of labour is still vivid.
(Impregnable) John Whites brand name for boots and shoes