unpick
verb (used with object)
to take out the stitches of (sewing, knitting, etc.).
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
As she did so, the old scarlet coat which she had been unpicking fell to her feet.
From There was a King in Egypt by Norma Lorimer