****
> ) ⇒
* * *
****
>
>
> ① ****
>
> ②
>
> ③
>
> ④
* * *
So as the _kanji_ implies, is an alternative spelling with a nuance of a grave or harsh or atrocious (, ) situation.
* * *
Perhaps it is worth noting that the Agency of Cultural Affairs considers more common:
> ****
>
> ** **
>
> [...]
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ** **
>
>
>
>
>
>
>
>
(kokugo.bunka.go.jp)