This is the 335th most frequent Czech word.
projektu
"Projektu" means "of the project" in English.
Here, 'projektu' is the genitive singular form of 'projekt', indicating possession ('of the project').
Podílím se na tvorbě nového projektu.
I am participating in the development of a new project.
Here, 'projektu' is in the dative singular form of 'projekt', employed to indicate the indirect object of the action ('to discuss concerning the project').
Sešli jsme se k projednání projektu.
We met to discuss the project.
In this sentence, 'projektu' is the genitive singular form of 'projekt', used due to the preposition 'tohoto', denoting specificity ('of this project').