also: まきはだ
noun
caulking; oakum
Nautical term for material used to seal seams in wooden ships. Rare in everyday Japanese.
船大工が槇皮を使って船の隙間を埋めた。
The shipwright used oakum to fill the gaps in the ship.
The origin is uncertain; the kanji 槇 (Chinese juniper) and 皮 (bark) suggest a material originally made from bark fibers.