To disassemble, to undo.
to take apart, to criticize harshly
To undo sewing stitches.
To undo knitting in order to reuse the wool.
To unravel or untangle the threads of a rope etc.
To unfold; to solve.
to undo, untie, or open or become undone, untied, or opened.
Somehow she managed to unsnib the window and escape.