兵 soldier

Soldiers HATE REMFs.

The sergeant makes soldiers march up and down the hill on their tired legs.

infantryman, low-ranking soldier ★★☆☆☆
兵 (soldier) + 士 (samurai radical) = 兵士 (infantryman, low-ranking soldier)

arms ★★☆☆☆
兵 (soldier) + 器 (instrument) = 兵器 (arms)

arms: unlike the related term 武器(ぶき）, 兵器 generally means things that are very modern and big: bazookas, missiles, rocket launchers, howitzers.