unthread

un- +‎ thread

unthread (third-person singular simple present unthreads, present participle unthreading, simple past and past participle unthreaded)

1. (transitive) To draw or remove a thread from.
2. To loosen the connections of.
3. To make one's way through.
   • 1820, John Keats, "Isabella; or, The Pot of Basil", XXXVII:

     The while it did unthread the horrid woof

     Of the late darken’d time ...

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