sfumato
Rough Edges was created in 1970.
The Edges of Twilight was created on 1995-03-21.
Edges of the Lord was created on 2001-10-12.
scintillation
Angles Without Edges was created on 2001-09-18.
blurring means becoming glassy or to lose clear vision.
It is spelt exactly as typed in the question; blurry.
I don't know what you mean by "boundaries". "Blurring" has many uses in drawing and painting. One use of blurring is to indicate distance. Object edges (boundaries) may be blurred on items that are closer or farther away from the point of focus (subject). This imitates a natural function of the human eye. The technical term is "depth of field". It means, aria of acceptable focus. Ironhead Mike
Blurring effects are used in photography or image editing programs to highlight the subject. The biggest example is a person or couple in a busy setting; by blurring the background around them, the picture's focus shifts to the subjects and removes any distractions that are in the background.
Tablets are created with round edges so that they are less likely to stick together in the coating pan due to having a smaller surface area.
megalopolis :P