Unique rules when forming that grammar are highlighted like this
Example sentences follow these rules too!
Joining and Nesting Markers:
Verb[た/る] - means that dictionary form and ta form are accepted.
Verb[causative[て]] - means て form of the causative form of the verb.
(A) ずにはすまない is a formal written phrase, literally meaning that someone is "not going to get away without (A)". It is used when someone has to do something due to social norms, laws or customs. Reason for doing (A) is usually negatiive in some way.