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Revelations lie like a buried treasure under the wondrous but imperturbable musical surface.

It relies on imperturbable singing actors, Molly Irelan’s fanciful costumes and Soper’s wildly variegated score create an exultant excess of weirdness.

Paul Newman’s posthumous memoir, “The Extraordinary Life of an Ordinary Man,” sheds light on a seemingly imperturbable Hollywood star.

Like Andriessen, Crumb, too, had an imperturbable sway on young composers.

He recovered like somebody with an imperturbable mind.