scumble

详细解释:vt. 薄涂(颜色)
n. 渐淡, 渐淡画法, 薄涂

词型变化：

动词过去式:scumbled过去分词:scumbled现在分词:scumbling第三人称单数:scumbles

英语解释：

名词 scumble:

the application of very thin coat of color over the surface of a picture