This is the 12583rd most frequent Russian word.
конгрессмена
The Russian word "конгрессмена" means "congressman" in English, referring to a male member of a congress, especially in the United States.
Here, 'конгрессмена' is used in the accusative case as the direct object of the verb 'пригласили' (invited).
Конгрессмена пригласили выступить на конференции.
The congressman was invited to speak at the conference.
In this sentence, 'конгрессмена' appears again in the accusative case, as the direct object of 'встретили' (met).
Мы встретили конгрессмена на улице, и он приветливо улыбнулся.
We met the congressman on the street, and he smiled kindly.
Here, 'конгрессмена' is in the genitive case to indicate possession or source (from the congressman).