estomper
Estomper is a French verb meaning to soften, blur, or fade, especially in drawing and painting. In art terminology, estomper refers to creating smooth transitions between adjacent tonal areas by blending the edges of strokes rather than leaving hard lines. The related noun estompe denotes a blending tool used for this purpose, commonly a blending stump, tortillon, or soft tissue rolled into a cone; other implements such as a finger or a shim of paper can also be employed.
Technique: To estomper a gradient, an artist lays down a sequence of values and then lightly rubs
Usage and context: In French-language sources and instruction, estomper is common; in English writing, the verb
See also: shading, blending stump, tortillon, charcoal drawing, pastel.