But when St. John had mused a few moments he recommenced as imperturbably and with as much acumen as ever.
Mr. Rochester had sometimes read my unspoken thoughts with an acumen to me incomprehensible: in the present instance he took no notice of my abrupt vocal response; but he smiled at me with a certain smile he had of his own, and which he used but on rare occasions.
There are no more uses of "acumen" in the book.
Show samples from other sources
She built a very successful company with uncommon business acumen.
With her customary acumen, she brought the new division to profitability within a year.