Usage of で (Continuative?)


> 彼女は歌うだけ **で** は飽きたらず、涙まで流していた。
>
> 彼の弁明 **で** は飽き足りない

Is this で the same as the で used in "これでいい"? As in the continuative で?

I feel as though it could be replaced with "が" in the first example and just
left as "は" in the second example. What is the specific function of this で?




This で is a case particle (格助詞), not the one from copula だ.

In those sentences you can treat it as "with".

> 彼女は歌うだけでは飽きたらず、涙まで流していた。  
>  _Not satisfied **with** simply singing, she also shed tears._  
>  (Actually is a literary/rhetorical way to tell _She didn't only sing but
> also shed tears._ )
>
> 彼の弁明では飽き足りない  
>  _I feel insufficient **with** his apology._

* * *

> _I feel as though it could be replaced with "が" in the first example and
> just left as "は" in the second example._

Both are incorrect. In the second example, replacing it with は makes a small
grammatical difference.

> 彼の弁明では飽き足りない → subject is (usually) 私  
>  彼の弁明は飽き足りない → subject is 彼の弁明 (it makes me feel...; it's felt...)

