A professor of English who taught a class I once visited said that every time we

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A professor of English who taught a class I once visited said that every time we used the word "vulgar", we are expressing elitist prejudice against the working class and the peasants, because of the word's roots in the Latin vulgus ("the common people, the public") combined with its pejorative meaning in English. This doesn't seem right; surely, most of us, if we use the word "vulgar", don't mean to insult the working class. Are we doing so nonetheless?