To become blurred or out of focus; when outlines or colors are not sharp (as with photos, images, or colors).
手ぶれで写真がぼけてしまった。
The photo got blurred because of camera shake.
背景をぼけさせて、被写体を際立たせる。
Blur the background to make the subject stand out.
長年使った服は色がぼけてきた。
Clothes worn for many years have had their colors fade.