Bokeh is a photography term
Bokeh comes from the Japanese word "bakery" which means blurred, or blurry. An ' h ' was put at the end to be able to speak better, and it is now a term for the quality of the background sharpness. When people say they like photos made with a SLR camera, they often mean the scheptediepte, the bokeh: the subject in the foreground is sharp and the background is blurred. You have different gradations in the bokeh: in a strong bokeh, the background is often so blurred that it is no longer recognizable (this is common in macro photography). Https://www.youtube.com/watch?v=ltlHTwuLgMw