Two fold, twofold, or two-fold: which one is the best option?
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What do dictionaries show it as? – KillingTime Mar 20 '20 at 08:44
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I found all three versions. – Wolfgang Mar 20 '20 at 09:15
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Research is always good — it needs to be included in the question. But we have a canonical answer. If that answer does not answer this question, please edit it to explain the particular difficulty. – Andrew Leach Mar 20 '20 at 09:17