Here is a new grammatical teaser for the learned. When you are splitting hyphenated words with a comma, what is the correct punctuation? Example: 'It was both a power-, and life-, giving appliance.' Is the above strucutre correct or is it simpler to write, 'It was both a power-giving and life-giving appliance.' AND - if you do want to separate hyphenated words is the orignial structure correct?