In a folded manner; with something bent or closed up, though this word is quite rare and archaic in modern English.
From the verb 'fold' plus archaic adverbial endings '-ed' and '-ly.' This formation follows old English patterns for creating adverbs that are mostly extinct.
This is one of those delightfully weird archaic words that almost nobody uses anymore—it would have made perfect sense in Shakespeare's time but sounds comically stiff today.
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