Word Mix-Up: DAIRY and DIARY

DAIRY: The noun "dairy" dates to the late 13th century, when it referred to a building where butter and cheese were made. It is now also used as an adjective referring to cheese and other products made from milk.

DIARY: The word "diary" refers to a day-by-day journal. It is from the Latin word diarium which in turn comes from Latin dies, meaning "day."

Although these words are pronounced quite differently, it's an easy typographical error to make — and one that the spellchecker will not catch.

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