This is the 12554th most frequent Russian word.
коммерческим
"Commercial" or "related to commerce."
In this sentence, 'коммерческим' is used as an adjective to describe the project as being related to commerce or business.
Этот проект является коммерческим и направлен на получение прибыли.
This project is commercial and aimed at generating profit.
Here, 'коммерческом' modifies 'отделе', indicating that the department deals with commerce or business activities.
Она работает в коммерческом отделе компании.
She works in the commercial department of the company.
'Коммерческих' is in the plural form and is used to describe conditions that are associated with commerce or business, often implying profitability.