This is the 17606th most frequent Russian word.
турниром
"Турниром" is the instrumental case of "турнир," meaning "tournament."
Here, 'турниром' is part of the phrase used in describing the event 'турнир', indicating the involvement in a competitive event.
Мы участвуем в шахматном турнире.
We are participating in a chess tournament.
In this sentence, 'турниром' refers to the context of the competitive event itself, emphasizing the preparation and outcome.
После тяжёлой подготовки к турниру, она наконец выиграла.
After hard preparation for the tournament, she finally won.
In this example, 'турниром' indicates the type of competitive event, specifying its nature as a football tournament.