And so saying, he moved along the windlass, here and there using his leg very freely, while imperturbable Bildad kept leading off with his psalmody.
"My captain, you must have ere this perceived, respected sir"—said the imperturbable godly-looking Bunger, slightly bowing to Ahab—"is apt to be facetious at times; he spins us many clever things of that sort.
There are no more uses of "imperturbable" in the book.
Show samples from other sources
Silas was imperturbable.
Neil Gaiman -- The Graveyard Book
Out of loudspeakers all around Zollverein, the staccato voice of the Reich grows like some imperturbable tree; its subjects lean toward its branches as if toward the lips of God.