dubbin
/ˈdʌbɪn/a greasy mixture of tallow and oil applied to leather to soften it and make it waterproof (革皮用的)软化防水油脂
noun [物质名词] 防水油；皮革保护油
He applied dubbin to his leather boots to keep them supple. 他在皮靴上涂了软化防水油以保持其柔韧性。
