бое́ц

fairly common #4068B2nounmasculineanimatecountable

1.
fighter, combatant, warrior
На ринг вы́шел молодо́й бое́ц.
A young fighter stepped into the ring.
Used of anyone who fights: in war, in a boxing/MMA ring, or figuratively for a struggle.
2.
soldier, privatemilitary
В ро́те оста́лось де́сять бойцо́в.
Ten soldiers were left in the company.
Of a rank-and-file serviceman; common in military reports and Soviet-era usage.

Examples

Окапывающимся бойцам принесли воду и хлеб.
The soldiers digging in were brought water and bread.
Врач санчасти осмотрел больного бойца.
The medical unit's doctor examined the sick soldier.
Молодого бойца комиссовали через полгода службы.
The young soldier was discharged after six months of service.
Он стал закалённым бойцом после армии.
He became a toughened fighter after serving in the army.
Санитар, перебинтовывавший бойца утром, теперь отдыхал.
The medic who rebandaged the soldier in the morning was resting now.
Билл - отли́чный бое́ц.
Bill is a great fighter.
Перестреливавшиеся бойцы наконец прекратили огонь.
The fighters who had been exchanging fire finally ceased fire.
Бойцы окапывались всю ночь под дождём.
The fighters dug in all night in the rain.

⚠️ Stress change.