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Hyphen
The hyphen is used to divide words at the end of a line, to join the words in compound numbers from twenty-one to ninety-nine, and to form compound words. It is also used to join numbers that indicate the life span of an individual and the scores of a game.
489.1 To Divide a Word
The hyphen is used to divide a word when you run out of room at the end of a line. Divide words only between syllables. Here are some additional guidelines: