Is 「意味の分からなさ」 strange?


Since [my recent question about
〜く＋ある](https://japanese.stackexchange.com/q/13308/1478), I've been trying to
learn more about the differences between 形容詞「無い」 and 助動詞「〜ない」. In other words,
I'm trying to learn how the independent adjective _nai_ and the negative verb
suffix _-(a)nai_ are different.

We have a question about [whether verbs ending in 〜ない are
adjectives](https://japanese.stackexchange.com/a/5110/1478) already, and in
one answer, a user writes that the negative verb 食べない can't take the suffix
`-さ`, so *食べなさ is unacceptable. I was curious whether that was true of all
verbs, so I decided to search for `なさ` in the [_Balanced Corpus of
Contemporary Written Japanese (BCCWJ)_](http://www.kotonoha.gr.jp/shonagon/).
Unfortunately, this had a lot of false positives due to forms like `〜なさい`,
`〜なさそう`, `〜なさすぎる`, and verbs like `なさる`, and so on.

To filter out false positives, I decided that I needed to search for a more
specific example. The form I chose was `分からなさ`, because regardless of whether
it's correct or not, it made sense to me. I was able to find only one example
in BCCWJ, and it was taken from the web portion of the corpus:

> 泣きました・・・。もうダメだ・・・。 **意味の分からなさ** で言えばきっとハウルなんかと大差ないんだろうけど・・・。ヤバい・・・。

This example seems very informal, and I suppose the author wasn't worrying
about writing "properly". I was able to find more examples on Google by
searching for
[意味の分からなさ](https://www.google.com/search?hl=ja&output=search&sclient=psy-
ab&q=%22%E6%84%8F%E5%91%B3%E3%81%AE%E5%88%86%E3%81%8B%E3%82%89%E3%81%AA%E3%81%95%22&=&=&oq=&aq=&aqi=&aql=&gs_l=&pbx=1),
some of which seemed a little bit less informal:

> もはやその言葉の **意味の分からなさ** は、僕らの常識をはるかに上回っております。
> ([link](http://www.geocities.jp/gampared/gx-47.html))  
>  しかし、この、石の **意味の分からなさ** こそが、最も素晴らしい点だと思います。
> ([link](http://pokkuri.jp/music/pokkuri/06kin/pokkur070501.htm))  
>  ここから、「 **意味の分からなさ** 」ということを考えた。
> ([link](http://nekohei2nd.blog.shinobi.jp/%E6%9C%AA%E9%81%B8%E6%8A%9E/%E7%95%B0%E7%89%A9%E6%84%9F))

I'm not sure if I can draw any conclusions from these examples. My guess is
that using `-さ` like this is only acceptable informally, judging by how I can
find results online but not in published books. But I suppose it's also
possible that the results I've found are very unusual, or that I've
misunderstood what `-さ` is doing in these examples.

So, is `意味の分からなさ` strange?




I am no longer sure about the reason why 食べなさ sounds strange. In the answer
below, I argued that 食べなさ “the degree of not eating” would be grammatically
fine but semantically not useful in any context. However, as dainichi
commented, this explanation is questionable. For example, different people
have different “degrees of not eating vegetables”; some may not eat certain
raw vegetables while others may refuse to eat any vegetables whatsoever. So
this does not seem to explain why we can say 学生はレポート課題の意味のわからなさに頭を抱えた but not
*田中さんは子供の野菜の食べなさに頭を抱えた.

In the meanwhile, I will keep the answer I posted in the hope that it may be
useful to consider the current question.

* * *

No, I do not find anything strange with 意味のわからなさ. I do not even think that the
construct -なさ is informal.

_[Edit: In an earlier revision, I stated that I did not think 意味のわからなさ was
informal, but I take this word back. I agree with Tokyo Nagoya that 意味のわからなさ
is an informal expression. I think that it is because expression 意味がわからない
itself is informal, not because -なさ is informal.]_

As I understand it, there is no _grammatical_ reason to prevent suffix -さ from
attaching after suffix -ない. (Aside: Are both 接尾辞 and 助動詞 called “suffix” when
people talk about the Japanese grammar in English?)

食べなさ indeed sounds strange to me, but I think that the reason for this is
semantic rather than grammatical. Its meaning would be “the degree of not
eating,” but I cannot come up with a context where this notion would make
sense.

In contrast, 意味のわからなさ, “the degree of not making sense,” well, makes sense.
Some thing does not make sense, but it is possible for some other thing to be
even more nonsense.

Here are some other examples in BCCWJ where a verb is followed by -なさ:

  * 割り切れなさ (5 occurrences)
  * 落ち着かなさ (3 occurrences)
  * 至らなさ (13 occurrences) — But: we may argue that 至らない is an adjective which is derived from the negation of verb 至る because, although we say 注意が至らない, we rarely say 注意が至る/至っている.




I am no longer sure about the reason why 食べなさ sounds strange. In the answer
below, I argued that 食べなさ “the degree of not eating” would be grammatically
fine but semantically not useful in any context. However, as dainichi
commented, this explanation is questionable. For example, different people
have different “degrees of not eating vegetables”; some may not eat certain
raw vegetables while others may refuse to eat any vegetables whatsoever. So
this does not seem to explain why we can say 学生はレポート課題の意味のわからなさに頭を抱えた but not
*田中さんは子供の野菜の食べなさに頭を抱えた.

In the meanwhile, I will keep the answer I posted in the hope that it may be
useful to consider the current question.

* * *

No, I do not find anything strange with 意味のわからなさ. I do not even think that the
construct -なさ is informal.

_[Edit: In an earlier revision, I stated that I did not think 意味のわからなさ was
informal, but I take this word back. I agree with Tokyo Nagoya that 意味のわからなさ
is an informal expression. I think that it is because expression 意味がわからない
itself is informal, not because -なさ is informal.]_

As I understand it, there is no _grammatical_ reason to prevent suffix -さ from
attaching after suffix -ない. (Aside: Are both 接尾辞 and 助動詞 called “suffix” when
people talk about the Japanese grammar in English?)

食べなさ indeed sounds strange to me, but I think that the reason for this is
semantic rather than grammatical. Its meaning would be “the degree of not
eating,” but I cannot come up with a context where this notion would make
sense.

In contrast, 意味のわからなさ, “the degree of not making sense,” well, makes sense.
Some thing does not make sense, but it is possible for some other thing to be
even more nonsense.

Here are some other examples in BCCWJ where a verb is followed by -なさ:

  * 割り切れなさ (5 occurrences)
  * 落ち着かなさ (3 occurrences)
  * 至らなさ (13 occurrences) — But: we may argue that 至らない is an adjective which is derived from the negation of verb 至る because, although we say 注意が至らない, we rarely say 注意が至る/至っている.

