Illustration: Florie Duhau

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People have been mispronouncing "asterisk" since the word entered the English language from Late Latin (asteriscus from the ancient Greek asteriskos, meaning "little star.")

The problem here is switching the correct "sk" ending with a "ks" ending. (Some people take it a step further and drop the s.) If you do it or have done it, you are not alone. People have been switching letters and sounds in English (and other languages) since language began. It is called metathesis—the rearranging of sounds in a word.