I would like to know which is the meaning of the structure ～ずにはすまない.

According to several pages that I've found on Google, it means "must, have to"
as well as ～なければならない. However, in other websites ～ずにはすまない seems to mean "not
having another option than" (like ～ざるを得ない). If ～ずにはすまない means the same as
～なければならない or ～ざるを得ない, I would like to know the difference between these
structures.

If besides that, you could please give me an example of ～ずにはすまない I would be
really thankful.
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2020-08-20T17:10:47.680
80252
2020-10-23T20:01:25.203
29677
question
grammar meaning
Meaning of ずにはすまない
As far as I understand, ~ず is a more formal alternative to ~ないで ~~and すむ is
"to live", so it will be something along the lines of "Can't live without
~ing", which would match both "have to" and "not having another option
than".~~ and my guess about すむ was completely off. See @Nanigashi 's comment
below.
CC BY-SA 4.0
2020-08-24T11:07:57.430
80299
2020-09-23T19:58:54.900
2020-09-23T19:58:54.900
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answer