This is the 1405th most frequent Russian word.
врагом
The Russian word "врагом" means "as an enemy" or "by an enemy" (instrumental case of "враг," meaning "enemy").
The word 'врагом' in this sentence is used in the instrumental case to denote 'being an enemy' or 'taking the role of an enemy'.
Он стал врагом после того случая.
He became an enemy after that incident.
The term 'врагом' here is instrumental case, implying the entity we are confronting during the stated struggle.
Мы должны бороться с врагом ради свободы.
We must fight the enemy for freedom.
Here, 'врагом' appears in the instrumental case, utilized to highlight the status as perceived by the subject.