Usage of じゃ in 西瓜を買うと、俺もあいつも好きじゃで両得じゃ


> 西瓜を買うと、俺もあいつも好きじゃで両得じゃ。

じゃ means then, well then. But what does じゃ in the above context? Seems the
definition of then, well then can't fit in this sentence.




This じゃ is a dialectal copula (linking verb) which is used instead of だ. This
じゃ is actively used in some areas of western Japan (especially in Hiroshima),
but it's [also known as a typical role word of old
men](https://japanese.stackexchange.com/q/23690/5010). You will also see じゃから
instead of だから, じゃが instead of だが, じゃった instead of だった, and so on. じゃあ in
modern standard Japanese is totally different.

> 西瓜を買うと、俺もあいつも好きじゃで両得じゃ。  
>  ≒ 西瓜を買うと、俺もあいつも好きだで、両得だ。  
>  If I bought a watermelon, both he and I like it, so it would be win-win.

で after a clause can sometimes denote a cause or a reason.




This じゃ is a dialectal copula (linking verb) which is used instead of だ. This
じゃ is actively used in some areas of western Japan (especially in Hiroshima),
but it's [also known as a typical role word of old
men](https://japanese.stackexchange.com/q/23690/5010). You will also see じゃから
instead of だから, じゃが instead of だが, じゃった instead of だった, and so on. じゃあ in
modern standard Japanese is totally different.

> 西瓜を買うと、俺もあいつも好きじゃで両得じゃ。  
>  ≒ 西瓜を買うと、俺もあいつも好きだで、両得だ。  
>  If I bought a watermelon, both he and I like it, so it would be win-win.

で after a clause can sometimes denote a cause or a reason.

