[sfu:'mɑ:tәu]
<意>[画]n.( 使素描中的明暗或色彩中的色阶有层次地调和的)渲染层次

Sfumato \Sfu*ma"to\, a. [It.] (Paint.)
Having vague outlines, and colors and shades so mingled as to
give a misty appearance; -- said of a painting.