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A hyphen (-) looks similar to a dash but is shorter and used in a few cases to show that the two things it joins belong together.
Hyphens between two adjectives that work as one
Use a hyphen to combine words that work together to form a single description.
- The fifty-five-year-old athlete was just as qualified for the marathon as his younger opponents.
- My doctor recommended against taking the medication, since it can be habit-forming.
- My study group focused on preparing for the mid-year review.
Hyphens when a word breaks at the end of a line
Use a hyphen to divide a word across two lines of text. Most word-processing programs will do this for you. If you have to manually insert a hyphen, place the hyphen between two syllables. If you are unsure of where to place the hyphen, consult a dictionary or move the entire word to the next line.
My supervisor was concerned that the team meet-
ing would conflict with the client meeting.