ボケ

noun

blur; lack of focus; unsharpness

Refers to a blurred or out-of-focus state, especially in photography or vision.

• この写しゃ真しんはボケがひどい。

  This photo is badly blurred.

• 背はい景けいのボケがきれいなレンズだ。

  This lens produces a beautiful background blur.