The discussion of some topics, even with Mrs. Micawber herself (so long the partner of my various vicissitudes, and a woman of a remarkable lucidity of intellect), is, I am led to consider, incompatible with the functions now devolving on me.
The principal function of this retainer was to quarrel with the cook; in which respect he was a perfect Whittington, without his cat, or the remotest chance of being made Lord Mayor.
As I left him, resuming his stool and his pen, and rolling his head in his stock, to get it into easier writing order, I clearly perceived that there was something interposed between him and me, since he had come into his new functions, which prevented our getting at each other as we used to do, and quite altered the character of our intercourse.
There are no more uses of "function" in the book.
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I can't function on less than six hours of sleep a night; and I do best on nine.
My brain does not function as well when I'm under stress.