function of the particle も in 「~も辞さない」


I came across the sentence「訴訟も辞さない」in a book today and even though I am able
to understand its meaning, I can't figure out the actual function of も in this
case.

I looked into my grammar dictionary and the most satisfying definition I got
was "も: a marker which indicates emphasis", but I'm not convinced it's the
right one.

Should I just think it as a whole with 「辞さない」？ I know it's a phrase used to
express one's willingness to do something, but is it used with any other
particle ?

Thank you for you answers in advance.

Also, I can provide context if needed.




I think the も here is this:

> 1⃣ 係助詞
> 3-㋑動詞の連用形や動作性名詞に付き、打消しの語と呼応して、強い否定の意を表す。「思いもよらぬ話」「返事もしない」([デジタル大辞泉](http://dictionary.goo.ne.jp/jn/218351/meaning/m0u/))

So the も indicates emphasis, used with a negative phrase.

I think this も is usually translated as "even":

  * 訴訟を辞さない wouldn't hesitate to file a lawsuit; willing to bring a lawsuit 
  * 訴訟 **も** 辞さない wouldn't **even** hesitate to file a lawsuit; willing to bring **even** a lawsuit 




I think the も here is this:

> 1⃣ 係助詞
> 3-㋑動詞の連用形や動作性名詞に付き、打消しの語と呼応して、強い否定の意を表す。「思いもよらぬ話」「返事もしない」([デジタル大辞泉](http://dictionary.goo.ne.jp/jn/218351/meaning/m0u/))

So the も indicates emphasis, used with a negative phrase.

I think this も is usually translated as "even":

  * 訴訟を辞さない wouldn't hesitate to file a lawsuit; willing to bring a lawsuit 
  * 訴訟 **も** 辞さない wouldn't **even** hesitate to file a lawsuit; willing to bring **even** a lawsuit 

