Miss Bennet was the only creature who could suppose there might be any extenuating circumstances in the case, unknown to the society of Hertfordshire; her mild and steady candour always pleaded for allowances, and urged the possibility of mistakes—but by everybody else Mr. Darcy was condemned as the worst of men.
There are no more uses of "extenuating" in the book.
Show samples from other sources
He knows there are, well, extenuating circumstances.
Kass Morgan -- The 100
There were extenuating circumstances in their case—they were married, they had a child.