This is the 349th most frequent Polish word.
powiecie
"Powiecie" means "you will say" or "you would say" (2nd person plural).
Here, 'powiecie' is the second person plural form of the verb 'powiedzieć', used in the sense of proposing an idea or asking for feedback on a suggestion.
Co powiecie na wyjście do kina dzisiaj?
What do you say about going to the cinema today?
In this sentence, 'powiecie' refers to a territorial unit in Poland (county), showing its use as a noun.
W waszym powiecie jest wiele pięknych jezior.
In your county, there are many beautiful lakes.
Here, 'powiat' is used in locative case for the noun (territorial unit), and 'powiedzcie' is the imperative mood for addressing multiple persons, showcasing interplay of different meanings of the root word.