oakum       
noun [ U ] uk/ˈəʊ.kəm/ us/ˈoʊ.kəm/
 涂了胶水用于填塞缝隙的的细纤维,填絮(传统意义上的填絮由旧缆绳制成,用于填塞甲板上长条木板之间的空隙)。
thin fibres covered in a sticky substance and used for filling gaps. Oakum was traditionally made from old ropes and used to fill the gaps between the long, flat pieces of wood on a ship's deck (= floor).
  We packed the cracks with oakum. 我们用填絮把缝隙堵住。 
 Then she saw a group of prisoners sitting in a dark cellar picking oakum (= separating the fibres from old ropes). 然后她看到一群囚犯坐在昏暗的地窖里在制作填絮。 
 - More examples
 - Oakum was used to seal the seams between planks of wood on a boat.
 - We filled every seam and crevice with oakum steeped in tobacco juice.
 - Prison labour included picking oakum and sewing sacks.