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References in classic literature ?
Even had there been no bitter recollections, nor any hostile interest now at stake between them, the mere natural repugnance of the more sensitive system to the massive, weighty, and unimpressible one, must, in itself, have been disastrous to the former.
But when the day is done, even the most unimpressible must yield to the dreamy influences of this tranquil starlight.
No, but still it is very unpleasant to live with such unimpressible, incomprehensible creatures.
Another objectionable circumstance is, that the pokey unknowns support each other in being unimpressible.
Uranus in your floaty, swirly bits means that you're going to lose weight by following an all-you-can-eat diet, get fit by taking lifts, be upgraded to business class on every flight on the back of your friendly Valleys accent, get your own TV show where top-notch chefs TRYto impress unimpressible you, win the Lottery without having ever put a pound on, and be happy, happy, happy with your lot.
Victor Low, The Unimpressible Race: A Century of Educational Struggle by the Chinese in San Francisco (San Francisco: East/West Publishing Co.
to remain, as it were, singly unimpressible to the magic influences of an art which is said to have such an especial stroke at soothing, elevating and refining the passions.
It is notable that some of my pathologically unimpressible colleagues on the northern circuit rate him highly.