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