名詞 oakum:

1. loose hemp or jute fiber obtained by unravelling old ropes; when impregnated with tar it was used to caulk seams and pack joints in wooden ships

oa.kum

n.（名詞）
Loose hemp or jute fiber, sometimes treated with tar, creosote, or asphalt, used chiefly for caulking seams in wooden ships and packing pipe joints.
麻絮，埋絮：疏松的大麻或黃麻纖維，有時涂上焦油、雜酚或瀝青作保護層,主要用于木船上捻縫和填塞管子接頭

來源：
Middle English okom
中古英語 okom
from Old English 3cumba * see gembh-
源自 古英語 3cumba *參見 gembh-