These phenomena are called fuzzy because, due to the absence of straight edges, they appear blurred when rendered: they are composed of particles.
Ke dingwe tse di bidiwang ditlhare tsa go fetolelwa ka gonne, fa di se na matlhare, makaleng a a tlhakatlhakaneng a akanngwa a lebelega jaaka medu e e lebeletseng kwa godimo tlamela loaping.