Trouble understanding different meanings of べつに


I know べつに can mean "nothing", (not) particularly, not a big deal, I don't
care etc. But I have some trouble understanding what it means in long
sentences like these. I only have an idea, but I'm so not sure so I would like
some confirmation. I'm adding some context where necessary.

first sentence

Person 1:

> 合宿に限らずもうちょっと抑えなきゃって思ったの. 一護に嫌われたくないから.
>
> 一護: **べつに** そんなの...

I can only understand that 一護 is denying what's been said but I don't know
what べつに is doing there.

second sentence:

context: two friends are working on a project, one of them sees the other
really focused and working hard and says that he must be really enjoying the
task. His reply is

> え? いいえ. **べつに** ,普通だよ.

I think here it means "it's nothing/not a big deal"?

third sentence:

> **別に** 嫌なわけじゃないですし.

does it mean "I don't **particularly** hate it"?

fourth sentence

矛盾...

> しててもいいんじゃないですか **べつに**

I'm kind of lost here. I think it means "nothing" but I'm not completely sure.

I would appreciate if someone can correct my interpretation of the word in
each context.




べつに means "not particularly". When you use it to deny something, you're saying
there's no particular reason it would be that way (べつに...わけではない), or that it's
not particularly that way (べつに...ない). べつに is typically used in a negative
sentence, but when it gets used in a positive sentence, there's an additional
negative sentence that's being implied by the べつに.

So in your first example, "べつにそんなの" is saying there's no particular reason
that he would do something like hating her. The negative clause is being
omitted and reduced to そんなの ("that sort of thing", referring to him hating
her).

In your second example, the speaker feels he's putting in a typical amount of
effort, so he's saying there's no particular reason one should think he's
having fun. You could consider it an abbreviation of "べつに楽しんでいるわけじゃないよ、普通だよ".

In your last example, the person is asking if it's okay to do something, but
with a bit of an attitude. してもいいんじゃないですか is already asking "It's okay if I do
this right?" with the presumption that yes, it's okay (this comes from the
んじゃない？). Adding べつに is like a supplement to the sentence (they could have put
it before the verb, but they're adding it as an addendum), expressing that the
speaker doesn't believe there is any particular reason it would not be okay to
do.

べつに is commonly used when giving someone permission to do something between
friends. If Person A asks "～してもいい？" "Is it okay if I ~?" then Person B can
consent with "べつにいいよ", which says "It's okay! (there isn't any particular
reason it wouldn't be)".

I would go to <http://yourei.jp/%E5%88%A5%E3%81%AB> and look at some of the
negative sentences it is used with. Try and get a feel for how "not
particularly" is used. Also when you see べつに used with a positive sentence,
think of what the べつに is trying to say (the "hidden" negative clause).

