n. 大衣内的上衣, 绒毛, 内层油漆( undercoat的名词复数 )

n seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion

n the first or preliminary coat of paint or size applied to a surface

n thick soft fur lying beneath the longer and coarser guard hair

v cover with a primer; apply a primer to