Which there is nothing derogatory, but far from it in the appellation," says Mr. Snagsby, breaking off with a mistrust that he may have unpolitely asserted a kind of proprietorship in Mr. Weevle, "because I have known writers that have gone into brewers’ houses and done really very respectable indeed.
There are no more uses of "derogatory" in the book.
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It is unacceptable to use derogatory terms to reference a race or ethnicity.
She made a number of derogatory comments and left the meeting.