ボケ

ぼけ
noun
blur; funny man (in manzai); senility
entertainmenthealth
1. blur; out-of-focus area
the aesthetic quality of blur in out-of-focus areas of a photograph, now used internationally as a photography term
I took a photo with beautiful bokeh.
To shoot utilizing background blur.
このレンズはボケが綺麗(きれい)だ。
This lens produces beautiful bokeh.
2. funny man; straight man's partner
in Japanese comedy (especially manzai), the person who makes absurd statements or acts silly, contrasted with the tsukkomi
The back-and-forth between the funny man and straight man is amusing.
ボケを言(い)う。
To make a joke/silly remark.
He plays the funny man role in manzai.
3. senility; mental decline
age-related cognitive decline or confusion
ボケ防止(ぼうし)のために脳(のう)トレをしている。
I'm doing brain training to prevent senility.
年(とし)をとってボケてきた。
As I got older, I've become forgetful.
My grandfather's dementia is progressing.

COMMON COLLOCATIONS (sense 1):

English "bokeh" was borrowed from this sense.

COMMON COLLOCATIONS (sense 2):

COMMON COLLOCATIONS (sense 3):

Watch out