What's the plural form of prenegotiation? Here's the word you're looking for.
Answer
The noun prenegotiation can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be prenegotiation.
However, in more specific contexts, the plural form can also be prenegotiations e.g. in reference to various types of prenegotiations
or a collection of prenegotiations.