This is the 778th most frequent Czech word.
společností
"Společností" means "of the company" or "of the society," depending on context.
In this sentence, 'společnost' is used in its singular feminine form in the instrumental case to denote 'company' or 'corporation', specifically referring to an entity assisting in the project.
S tímto projektem nám pomáhala jedna významná společnost.
A prominent company helped us with this project.
In this instance, 'společnost' is in the instrumental case as 'společností', used to specify an entity with which cooperation was established.
Rád jsem navázal jednotnou spolupráci s touto společností.
I was pleased to establish unified cooperation with this company.
Here, 'společnost' appears in the instrumental case as 'společností', expressing the relationship or involvement of a company in the context of a discussion about collaboration.