(べつ)

べつに
adverb
not particularly, nothing special
1. not particularly, not really
Used with negative verbs to indicate that something isn't special or significant. Often conveys indifference.
(なに)()べたい?」「(べつ)に。」
"Do you want to eat something?" "Not particularly."
Common casual response
There's no particular problem.
I'm not particularly angry.
(べつ)(きら)わけじゃないけど興味(きょうみ)ないんだ。
It's not that I dislike it; I'm just not interested.
"Is there anything you want?" "Not really. The thought alone is enough."

(べつ)に is typically used with negative predicates to mean 'not particularly' or 'nothing special.' When used alone as a response ((べつ)に), it can sound dismissive or indicate indifference - similar to 'whatever' or 'not really.' The kanji (べつ) means 'separate/different'; (べつ)に literally suggests 'as something separate/special.'