The phrase four-letter word refers to a set of English-language words written with four letters which are considered profane, including common popular or slang terms for excretory functions, sexual activity and genitalia, and (depending on the listener/reader) sometimes also certain terms relating to Hell and/or damnation when used outside their original religious context(s), and/or slurs. The "four-letter" claim refers to the fact that a large number of English "swear words" are incidentally four-character monosyllables. This euphemism came into use during the first half of the twentieth century.
Read more about Four-letter Word: Older Discussion, Similar Euphemisms in Other Languages, Quotation, Use in Titles, The "seven Dirty Words"
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“The word “revolution” itself has become not only a dead relic of Leftism, but a key to the deadendedness of male politics: the “revolution” of a wheel which returns in the end to the same place; the “revolving door” of a politics which has “liberated” women only to use them, and only within the limits of male tolerance.”
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