What's the reading of -中 as a suffix?


I see this all the time, but I don't know that I've heard it spoken.

For example: インストール中

Is it simply "なか"?




The reading when used as a suffix in this case is ちゅう (the on-yomi of the
character [中](http://jisho.org/kanji/details/%E4%B8%AD))

So インストール中 is pronounced インストールちゅう. The meaning is "installing", or "in the
process of installation".

More generally, 〜中 used in this way can be thought to mean "in the process of
~"

_Edit: There is another possible usage of 〜中 which Hyperworm describes in
their answer._




It depends on the meaning.

中 used to mean "during / in the process of" must be pronounced ちゅう (as in
ジョン's post)

> インストール中【ちゅう】 now installing  
>  読込【よみこみ】中【ちゅう】 now loading  
>  建築【けんちく】中【ちゅう】 under construction

But in other uses, such as "all throughout" or "out of (all the)", it is
commonly read じゅう (although it seems that ちゅう is also an option?):

> 世界【せかい】中【じゅう】の人々 people all around the world  
>  クラス中【じゅう】で一番【いちばん】背【せ】が高【たか】い tallest in the class

