战友
zhàn yoǔ · HSK 6
comrade-in-arms
⚔️🤝 战 zhàn = battle + 友 yǒu = friend — your battle-friend
The word splits cleanly: 战 (war, battle) plus 友 (friend, companion). A comrade-in-arms is literally a battle-friend — someone who stands beside you in the fight.