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I am editing a research article, and I came across a phrase that I am having some trouble hyphenating:

"the detoxification of both endogenous and exogenous derived acetaldehyde."

My thought is that it should be "endogenously and exogenously-derived acetaldehyde." Is this way correct? In my search I saw some rules that said to omit the hyphen after adverbs that end in -ly, but it seems like it makes more sense in this phrase to include the hyphen. My only other question is should there be a hyphen after endogenously?

Thanks!

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  • I would write it exactly as you have.
    – WS2
    Mar 17, 2015 at 22:59
  • If you add one hyphen (and here I think it's more sensible), balance it with the other. But isn't ''the detoxification/elimination of both endogenous and exogenous acetaldehyde' adequate? Mar 17, 2015 at 23:16

2 Answers 2

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It should be either "endogenously and exogenously derived acetaldehyde" or, less elegantly but still intelligibly, "endogenously- and exogenously-derived acetaldehyde". Without the hyphens the adverbs both unambiguously modify the (past-participial) adjective, while with only one hyphen the adverb without a hyphen is left dangling.

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One does not hyphenate -ly adverbs that precede adjectives.

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