What are the negating-suffixes in Japanese?


I'm going to do my research about analysis of negating suffixes in Japanese
newspaper. But I have a big question and want to make sure about Japanese
suffixes. Are ーない、－くない、‐ではない、‐なし、‐ぬ、‐ず、 and ‐まい a kind of suffix?

If yes, is there any other negating suffixes besides what I've mention before?

If no, then what are the Japanese suffixes that have a function to negate
words?




Please make sure, you are interested in
**negating[suffixes](https://en.wikipedia.org/wiki/Suffix)**, right?

Assuming you understand what is a suffix at least in English....

> Are -ない、-くない、‐ではない、‐なし、‐ぬ、‐ず、 and ‐まい a kind of suffix?

Among these, only `-なし` can be grammatically called a **suffix**. It can form
derivative nouns that mean "someone/something without ～" or "～-less one".

>   * 名なし: (noun) an anonymous/nameless person
>   * 一文なし: (noun) a penniless person
>   * 能なし: (noun) a dumb, a fool (lit. "one without ability")
>

All others are grammatically classified as something other than suffix.
Basically these are more fundamental parts which are more like English "not",
"may not", "is not" or such. Of course you don't call these "suffix", do you?

As @choco said, there are several negating **prefixes** in Japanese. See: [不
and 非 and 無 and 未 usage
difference/rule](https://japanese.stackexchange.com/q/1893/5010)

