background
The French word 'arrière-plan' is used to describe the background of an image, scene, or situation. It can also refer to the circumstances or context that are not the main focus of a discussion or event.
The background of the picture is blurry.
This sentence describes a scenario where the area behind the main subject of a picture, the background, appears out of focus or unclear.
He devised a plan in the background while we were discussing.
This refers to a situation where while a discussion was ongoing, a person managed to create a plan discretely or without the others noticing it, hence using the word 'background' to denote secrecy or subtlety.
The mountains in the background add to the beauty of the landscape.
This sentence paints a visual image of a scenery where mountains, seen behind other elements of the landscape, contribute to its overall aesthetic appeal.