oakum
noun /ˈəʊkəm/
/ˈəʊkəm/
[uncountable]- a material obtained by pulling old rope to pieces, a job done in the past by prisoners, and used to fill holes in wooden ships
麻刀,麻絮(旧时由囚犯制造) 词源Old English ācumbe, literally ‘off-combings’. The current sense dates from Middle English.